Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc9e272de6b01a6c…

MALICIOUS

PDF

85.1 KB Created: 2021-09-05 08:57:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 52f9b9856477507677953e2bb7d8dbd4 SHA-1: 71eaa6b946397155059f42d12194daeb7ddb88ba SHA-256: fc9e272de6b01a6c3e91c4b93c499b7af170a24734e01df1824d930d81941ff8
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other domains, likely intended to redirect users to malicious content or phishing pages. The presence of external URIs and link farms on disposable hosting suggests a campaign to distribute malware or harvest credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://crysiq.ru/uplcv?utm_term=conversion+de+unidades+temperatura+pdf PDF link annotation
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/7a650662cc587f7e0eb095f8885d19e4/vasafowusazav.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e05b059fa3---fijujifufavipovewibalaj.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c7ac0d5a9---42427064478.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/44041762486.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/d068af722af74b2b52989e28ccad2459/37142085163.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16083710b8747f---7097440452.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/nav9dm1ucfic51qd560jgb4htp/vokuxagutejevevamuvuf.pdfIn PDF document text
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/21333438541.pdfIn PDF document text
    • http://taeguektour.com/FileData/ckfinder/files/20210623_E0867A729CBBFFF5.pdfIn PDF document text
    • http://pechati-piter.ru/userfiles/file/worimuzebemenafajovelejun.pdfIn PDF document text
    • http://newgrids.com/userfiles/file/75103469071.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160fdef3fbfa3b---netepabetipul.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/degofosusunesura.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/pevebegovukuw.pdfIn PDF document text
    • http://azstorestudio.com/uploads/files/morexejulexozexiximav.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160755a049b865---digipolarel.pdfIn PDF document text
    • https://cdpu.net/wp-content/plugins/super-forms/uploads/php/files/6940d814fec6249e62cd12aef8d61255/23336060069.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/24251263709.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160840c4ae0f4a---labalebasi.pdfIn PDF document text
    • http://labotinnghia.com/img/files/pakiwoxatoxagabixuxitijej.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b773a6216d---pabesewakizisuwozoramokes.pdfIn PDF document text
    • https://areicon.com/images/file/suketafokusatepafedisaxe.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/a252a2c7fd4264b702a47e62ebc83b7f/tukibipix.pdfIn PDF document text
    • https://aneri12.eu/res/file/18534687983.pdfIn PDF document text
    • http://tele-video.ru/upload/files/44288414070.pdfIn PDF document text
    • http://wolfroccatiassociati.it/userfiles/files/29705221821.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0B 19468 bytes
SHA-256: 3c231c16b36429de44e6a105bfbb3c60bfd7abed1ca660e2ab7e0e93be479d03
font_02_sfnt_off00012d72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D72 10808 bytes
SHA-256: fe29963139af4c343b5383c589036da4a588ac9bed7ae7e9a9a8b630ab04fd49

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