Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a0ddab05d82a5c9…

MALICIOUS

PDF

80.7 KB Created: 2021-09-05 04:59:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 44333a1307a66bc958d5bf714d6e7c86 SHA-1: a1fe695976c190e58823e3d4c5c466185d055533 SHA-256: 5a0ddab05d82a5c9fc8a7e1698fb03497c25020e1be73564305b147d06f5884a
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to distribute further malicious content. The primary attack pattern involves tricking users into opening the document, which then redirects them to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://psychologyforeverybody.com/ckfinder/userfiles/files/boxenaxuvagoba.pdf In PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160bee87a893b0---latexofesikajo.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160f9d503c96d1---ferikedefilazibetox.pdfIn PDF document text
    • https://tskrea.com/userfiles/file/gonubarubopulobijezixeva.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073fb9fd8a10---97109742460.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/zuben.pdfIn PDF document text
    • http://biomedia.asia/upload/ckimage/files/91033533183.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/narok.pdfIn PDF document text
    • http://cathugo.de/res/wysiwyg/file/xologajuvajixuj.pdfIn PDF document text
    • http://carriewoodfamily.com/clients/5/5b/5b9f2fb360c4065436fb7fe1267c3612/File/95897651548.pdfIn PDF document text
    • http://italiangreyhound.pl/img1/userfiles/file/gerijen.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1609b988a414d4---femasap.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16133da68dd814---51496574218.pdfIn PDF document text
    • http://mesterek.net/tmp/2033596903.pdfIn PDF document text
    • http://sanraimundo.cl/dyn/uploads/file/77064260703.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c039cf7650d---36840840216.pdfIn PDF document text
    • http://owop.challengersports.com/ckfinder/userfiles/files/dugotigatopudabarunodow.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/80ee146ccd33f18211528109b9555cd1/notilapuladi.pdfIn PDF document text
    • http://www.alcera.ca/userfiles/file/78703617623.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/83077861197.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/56889178144.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/fb3537a31c6e432cb03d3f03d5bd4014/zisaludufufajixoxizexub.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/3975203627.pdfIn PDF document text
    • http://xn--aknmedical-yub.com/uploads/file/28584010844.pdfIn PDF document text
    • http://be-now.pl/userfiles/file/99670120950.pdfIn PDF document text
    • http://baraanduliaptti.org/userfiles/file/60249515438.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=louise+hay+heal+your+body+book+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD513 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2A 10796 bytes
SHA-256: f7f43055bd2bdcf1039e382c15e64ef520bc7928e02f418a1d5f217902604ebb
font_02_sfnt_off000105f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F3 18176 bytes
SHA-256: 7302df8d09bce9777169db878682a3c629c5124ad6458f82bd414d8f4e18b3aa

Open this report in the interactive analyzer, or submit your own file for analysis.