Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fe3cb38c291778d…

MALICIOUS

PDF

71.9 KB Created: 2020-12-16 03:33:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 1f026b447931faef5e63883d55fe18d2 SHA-1: 912146b93fe7ea3c15bdf357b5bd0d81197496c9 SHA-256: 2fe3cb38c291778d5603a6de3e5a6e04b2383bb66f91eceaa8a069e2131c8898
234 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains strings related to templates and wkhtmltopdf, suggesting a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://ggtraff.ru/aws?utm_term=powerpoint+flyer+templates+free In PDF document text
    • https://tojewenegekov.weebly.com/uploads/1/3/4/5/134502344/budokaxejuzodojato.pdfIn PDF document text
    • https://jidugurulepapol.weebly.com/uploads/1/3/4/3/134310086/8810c.pdfIn PDF document text
    • https://siwizapetodid.weebly.com/uploads/1/3/4/0/134041585/sudizogimino-xudupijivepirus-tumuxonefalurir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5add2104edf1d77a1d016/t/5fc67e49173fb5383b84e5c0/1606843977711/72814710280.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd308239b0722912b0841/t/5fd0da9251357b44bb9baa86/1607522970825/amtrak_coach_vs_roomette_vs_bedroom.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf51def8cdb769c6d97246/1606373858974/dua_for_protection_from_all_evil.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f975bf71053ccb109642/t/5fc16c00f3de5e49b59a254c/1606511616890/human_communication_devito.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc27e5df7cf8c754034f2c2/t/5fcdb080c836a917f92af91c/1607315590637/fire_emblem_heroes_twitter_espanol.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/92440828183.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_off0000dd41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD41 5240 bytes
SHA-256: d0ffd50fe5fb8ec1bcec6be802fa26483daa6242d9dbc9a2370779f780f31365
font_01_sfnt_off0000ef15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF15 10480 bytes
SHA-256: 580a4d9eef8c40db9260f5db420aebecf488917c92a5270c92574ef870cffce6

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