Malicious PDF — malware analysis report

Static analysis result for SHA-256 015125f29601fc70…

MALICIOUS

PDF

73.4 KB Created: 2021-02-20 05:41:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1be1fd9311fe2c9ce329befc657e6df9 SHA-1: 435e61fd9e51ed385677162c4662257c23117089 SHA-256: 015125f29601fc70f5b595930a7aada035294a88878f052f01187f5f9f2e992d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs likely lead to further malicious content or phishing pages.

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
  • 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.
  • 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://seumenha.ru/123?utm_term=what+does+a+geotechnical+engineer+make PDF link annotation
    • https://pofifeluvoka.weebly.com/uploads/1/3/0/7/130739131/a1fdcc47c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467577/normal_5fc60c4ad7ca1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410002/normal_60205b057960c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410989/normal_5fd9347cc68ea.pdfIn PDF document text
    • https://mejotozoferu.weebly.com/uploads/1/3/4/8/134866749/14b39e6a9ed7cfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419430/normal_601740df55e83.pdfIn PDF document text
    • https://tobivuzulukimu.weebly.com/uploads/1/3/1/3/131384599/2c295.pdfIn PDF document text
    • http://jewlgems.com/crossy_road_unblocked_games_66111va.pdfIn PDF document text
    • https://luzenesezenobo.weebly.com/uploads/1/3/5/3/135307250/radovolagoxigi.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/haZlMhf/strawberry_cake_recipes_with_fresh_strawberries.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403818/normal_601cc138652b1.pdfIn PDF document text
    • https://cdn.sqhk.co/miweguzeg/je9NoNm/archery_tournament_flash_games.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501963/normal_5fc5d9c31eea2.pdfIn PDF document text
    • http://rm-swis-mine.com/conics_project_examplesphsb1.pdfIn PDF document text
    • https://nuzupodulekego.weebly.com/uploads/1/3/4/6/134615520/7165758.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374699/normal_602c8f10d6687.pdfIn PDF document text
    • https://cdn.sqhk.co/putuziboki/d1icjhF/granny_mod_green_alien_2019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/62487752136.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/axton_skill_tree_guide.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_off0000e2cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CF 5432 bytes
SHA-256: 52d50821b33782a9a02c17d88dd384c153886194a801387a4ca3702e59996eca
font_01_sfnt_off0000f529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF529 10248 bytes
SHA-256: 6ffc5cbe87c6c0164da1740e35ab0d48519e8fa6ccc5480ff8e529424df467b9

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