Malicious PDF — malware analysis report

Static analysis result for SHA-256 22c246fc23ea9405…

MALICIOUS

PDF

74.2 KB Created: 2020-12-18 14:37:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 5096f2ca209f2318401811f45e388f38 SHA-1: d7cb3738cd8298dba002bf439ede500510c13a7f SHA-256: 22c246fc23ea9405e07059846879a1d32b6d0fd54c08db05cd63dd703b77f12a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafficel.ru/strik?utm_term=nh+cross+country PDF link annotation
    • https://virubavu.weebly.com/uploads/1/3/4/7/134755547/rusutivotalug.pdfIn PDF document text
    • https://tuzigopidimeb.weebly.com/uploads/1/3/4/3/134320631/f565a8f6d1249.pdfIn PDF document text
    • https://siwizapetodid.weebly.com/uploads/1/3/4/0/134041585/tatumubufujelaz.pdfIn PDF document text
    • https://nibobesexetew.weebly.com/uploads/1/3/4/2/134266191/kuxuwopodugamiwevef.pdfIn PDF document text
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/75cfd0e8757.pdfIn PDF document text
    • https://pudorexejuvaw.weebly.com/uploads/1/3/1/4/131455832/noduwojin.pdfIn PDF document text
    • https://gudojovevisepu.weebly.com/uploads/1/3/4/3/134314990/9380991.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdeefe1972c46e3c642a61/1606283008030/kezawagemovazek.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc7d42ec98190d8a5337c0/t/5fdc9ad26542785c7ec7fa7f/1608293074968/fuzegud.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e727ea4a794d5645064f/t/5fc0fbfe9d79364840b086a4/1606482949692/goethe_institut_boston_events.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0b544c89e1c4b8fbd6471/t/5fc138ad3f75b1664300d547/1606498477995/6048695458.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2fb60c30a162e0c601609/t/5fc713d409f4d56e8f7d11f9/1606882262151/jedobexovox.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5336ee9fc3622d53e0f07/t/5fc969ad2378527678227f04/1607035310042/weed_firm_2_bud_farm_tycoon_mod.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD744 4432 bytes
SHA-256: 6cc0095afc7f921f83e9b86aa6f84079acf1b255b133e38ae432fbe8e208d1b1
font_01_sfnt_off0000e645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE645 11700 bytes
SHA-256: 70db89a5ab25c93b87b31b8252e6423ba97c4f49dd9aefe482206d71864af7bb
font_02_sfnt_off00010c8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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