Malicious PDF — malware analysis report

Static analysis result for SHA-256 571347bd9ab26ee7…

MALICIOUS

PDF

71.8 KB Created: 2021-04-14 06:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f8db24c730a8e4cf5546d8163825db58 SHA-1: 72638298738a98835580b8626054e85ba0efd227 SHA-256: 571347bd9ab26ee72be70665fc7a8db939d6234b5d07deb671ad42f3b9d388f8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and 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 0.9998

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 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/strik?utm_term=schwinn+airdyne+repair+near+me PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368496/normal_604b044c2423c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470027/normal_6055ad4dce9da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393034/normal_60133ae85f481.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485929/normal_5fde322ff2f5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415543/normal_603765fd20146.pdfIn PDF document text
    • https://wuluvaxezipow.weebly.com/uploads/1/3/5/3/135393263/motisim.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/change_master_code_on_vista_128.pdfIn PDF document text
    • http://negedibomul.sportsontheweb.net/wolff_anarchism.pdfIn PDF document text
    • https://vesekukoluvili.weebly.com/uploads/1/3/4/7/134759730/582d1edf.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/tabla_periodica_nacionalidad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483836/normal_60570756ab818.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/jafujasiwetid/43015087435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18a549b4-33ae-4ce5-839f-9220aedc33d8/15853074805.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/todok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c86f590-1bfd-4fbc-8ad1-2b081152d9ad/why_the_bible_is_inspired_by_god.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/kemadip.pdfIn PDF document text
    • http://mukanebesiva.atwebpages.com/arithmetic_and_geometric_sequences_worksheet_kuta_software.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/exponents_worksheet_grade_7.pdfIn PDF document text
    • http://jubogaju.atwebpages.com/can_you_use_a_water_flosser_with_braces.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04ca359f-3067-41d4-906f-05da1f58d43e/victoria_secret_angel_card_customer_service_phone_number.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB61 5400 bytes
SHA-256: 3aa64804ffec3cf9db33d157fa4d51c2ac5bdbb3cd3a5712cce2d5206d61a9b5
font_01_sfnt_off0000edb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB6 10652 bytes
SHA-256: 93f82256797e16ca9d6e69882fb174a5bae3bd3b0768d5d2e920eabadd0e332e

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