Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe336d5f6b29486…

MALICIOUS

PDF

81.9 KB Created: 2020-11-23 09:40:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a25afdacf82e26b627ae73f1710dcf5c SHA-1: 416d96e01ebd46ddbc49539c65fe4d5aa2166b17 SHA-256: ebe336d5f6b294864f94ba5799767aa01c9e3aa0a7bee92f7ec58495792f7fb4
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO farms or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to lead users to potentially harmful content.

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://trafffi.ru/123?utm_term=30+amp+rv+extension+cord+near+me PDF link annotation
    • https://xujebope.weebly.com/uploads/1/3/4/0/134018561/jizunujuzebo_ruwewen.pdfIn PDF document text
    • https://vajibenutiw.weebly.com/uploads/1/3/4/4/134487234/fesuged.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388165/normal_5f9205c36f64f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392441/normal_5fb5674697383.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/d6ea1e10-d10c-457c-8fe3-d27e816192e1/theme_of_the_raven_by_edgar_allan_poe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68744cff-bafe-42a9-b34a-e085b87e6705/17579301616.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/slim_x_genie_keto_side_effects.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5831cc2d-9c48-4b0e-9695-291c48b741c5/harry_potter_ve_zmrdanka_yoldal_oyun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54e7107d-c10a-4681-b3c1-5a8ab51ef605/munefarikujoxizobupok.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/osrs_ankou_slayer_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91448c4a-0bd8-49bd-842a-8e0843c70a25/finding_quincy_sharp_arkham_asylum.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_off0001026a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026A 5528 bytes
SHA-256: e133cddc4f3c5aba672291a94e032542f112c0895bdb273e9f7aae35a95e126a
font_01_sfnt_off00011524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11524 10968 bytes
SHA-256: c22ff36d55d3c4e1014b47639ee741298b28a8a943cc940d325043888cd4f285

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