Malicious PDF — malware analysis report

Static analysis result for SHA-256 f14dddcecb43dafb…

MALICIOUS

PDF

120.0 KB Created: 2021-06-28 06:10:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 706a989636a05ddae8565d81587a3457 SHA-1: 588c5d7fa8dfa6aabe29419f33882d34f9dec673 SHA-256: f14dddcecb43dafbadff7c213f84e75883a92cdd86f9aa2afe4b256ec42cfca3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm that directs users to multiple URLs hosted on compromised WordPress sites and disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a downloader or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9212

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9c38519ec---31577830002.pdf In PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609407874932f---wafifelixoj.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a669b925cd9---77451381408.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/mupavekeposedosobefuwod.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4532bec66---kojuperux.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3950a66744---sukexirijuzidafuxilaxaj.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/91985052886.pdfIn PDF document text
    • http://adveotec.com/img/file/rudapexagabowujubiguvag.pdfIn PDF document text
    • http://lalinpress.es/ckfinder/userfiles/files/2191038358.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160831ab01d3c4---98656443336.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab941de20e3---wuwirasabinebovomavovaz.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/pefinapebuwirimovuvawo.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ada16e4485c---jejozunabur.pdfIn PDF document text
    • http://engineersclasses4competition.com/files/others/xinoto.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/279f64c4bab414bc1735b2081c43b5a9/fajadekifepoxi.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c00cf2c7ebb---budufo.pdfIn PDF document text
    • https://flexrocksrollovers.com/wp-content/plugins/super-forms/uploads/php/files/np96bnumnodopmv29j3rrb9knj/16285942567.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/sepupuki.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160c28f952c188---difoxunekizofalabononono.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/35671099409.pdfIn PDF document text
    • http://yoron.net/up/files/lafabapidi.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/8436d067c03f6083373dd272f7237620/11164366951.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/3f785b31651281647188a6d2832931c7/33766128779.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/db0dfcbe8c7bc9ac061fd1b4f97559d4/salovixig.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d2ba1ea3eae---61159797719.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3dbd9de1f---28571975413.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/66958761246.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=induction+motor+solved+problems+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014a7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A7E 952 bytes
SHA-256: dae4183dc2711b782d4e49f32eb31f8d875bcba6d465dd7c4c6a65a419ab3dd3
font_01_sfnt_off00015198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15198 16116 bytes
SHA-256: c42d03b9fa5adedc7fcbcdc394befe4747da18f572440b65d32b9937cb899241
font_02_sfnt_off000166f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166F5 21744 bytes
SHA-256: 9343c68b07c964794000285be9e34826ab29fcdd597c8d8699c29bd542be0392
font_03_sfnt_off0001a077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A077 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off0001b88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B88E 10876 bytes
SHA-256: 50f79b416724455a88186a534444013d2654e3e56df8578ec67ab0371a678ed1

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