Malicious PDF — malware analysis report

Static analysis result for SHA-256 060c307fc1086cdf…

MALICIOUS

PDF

63.2 KB Created: 2020-11-18 16:21:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6891debb49b0bcd8e24630fc17274293 SHA-1: 49a23001984c94730d02800568158b59e587cfe3 SHA-256: 060c307fc1086cdff0ea471f76f03c92af01a8e6a18f8c42e91d12092faac467
222 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffine.ru/123?utm_term=hp+probook+450+g2+keyboard+replacement In PDF document text
    • https://dasowafajego.weebly.com/uploads/1/3/4/7/134723411/b3535.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/90d228ce-fb5c-4f08-8e5d-29c0cd32da33/strategic_management_planning_for_domestic_and_global_competition_14th_edition_ebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1720709-1303-43f1-a95a-7603a7405660/peretogawigas.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/wameperes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62a5ea76-7bba-4e7c-b08e-9e16c6f6b55e/12066290876.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/buramabonuxet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94ee1bde-19a4-4efd-9b0d-de4e8cda2f55/environmental_science_cunningham_13th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/zafinadubipofuvofedunuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3249dded-1c20-44b1-ac8d-5812bb4d42de/raxebajusov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b7cb3b3-5bd1-4b74-bbb0-688a34ed03ea/spirit_list_smash_ultimate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47ade982-18bf-4037-a619-f6083acadb13/princeton_adult_school.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9FB 5968 bytes
SHA-256: 74ce2c6fdc15f7980630fa4a33dbc0ff14280e9a8cba4296e4f370e531b382a9
font_01_sfnt_off0000ce4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE4B 9844 bytes
SHA-256: c0eac7caa498b69ccdf3e2cfb69c8d4044a9c46814131c06d40b41e98413cc40

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