Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a92b79013a5b563…

MALICIOUS

PDF

75.4 KB Created: 2020-11-18 06:24:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 3548a37b1ba2dd9d85c27e41af1d8398 SHA-1: 22fcedf652b64e913fbf43ed8cb65c2fe3766739 SHA-256: 0a92b79013a5b5636c0ddd110c8ecc019d5e1634ff2d445a3cfe374668e7e55e
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by 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 4

  • 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 https://trafffi.ru/strik?utm_term=strickland+family+tree PDF link annotation
    • https://zatafepe.weebly.com/uploads/1/3/4/0/134000007/selusel-sinilijesutami.pdfIn PDF document text
    • https://gojenegitoz.weebly.com/uploads/1/3/4/3/134387591/xofozugizifefivazuv.pdfIn PDF document text
    • https://josadezabo.weebly.com/uploads/1/3/4/4/134490641/2097263e66bd.pdfIn PDF document text
    • https://xedaliwim.weebly.com/uploads/1/3/1/4/131454603/nigugotikawip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449618/normal_5faece80e3ec8.pdfIn PDF document text
    • https://tovozilulu.weebly.com/uploads/1/3/0/8/130873983/xiwuvififitok.pdfIn PDF document text
    • https://mogezisatizate.weebly.com/uploads/1/3/0/7/130775403/2cb9b0945e65bb.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://s3.amazonaws.com/wovitiku/11474922461.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/21959532725.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/ordinal_numbers_worksheet_for_grade_2.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/jasele.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/boogie_woogie_sheet_music_piano.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_off0000df63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF63 4936 bytes
SHA-256: d6dc9ca3839a14f4e948f2ff74107ebe3950c71d83ec2891960d891abf42bfcd
font_01_sfnt_off0000f011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF011 10204 bytes
SHA-256: e0f9ee64965be1ac40c2e95e64f7b68161d9cde30ba1c87f4c8c1d21418a17fe
font_02_sfnt_off000112b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B9 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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