Malicious PDF — malware analysis report

Static analysis result for SHA-256 21a914ace35d6633…

MALICIOUS

PDF

79.1 KB Created: 2021-03-14 05:50:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 712b37eead0061a892bf0aad492302f4 SHA-1: 022d3a356015d8c71df13de09366aad2c7d2d430 SHA-256: 21a914ace35d6633217c226ee4f6e06f772d1766b306134ade550d84d72b0438
186 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 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 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://xezojetit.ru/wix?keyword=all+american+pressure+cooker+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384028/normal_604c9f4a6d4b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460232/normal_601b188bd302a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473902/normal_5fda2d9fe0bff.pdfIn PDF document text
    • https://kamukijupekud.weebly.com/uploads/1/3/3/9/133997827/9020906.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367271/normal_5fd917ef284ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383460/normal_602c6cb230913.pdfIn PDF document text
    • https://kimimidinom.weebly.com/uploads/1/3/1/4/131453749/1048340.pdfIn PDF document text
    • https://dexidexida.weebly.com/uploads/1/3/4/2/134235246/bibuwivogotagit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gisipusizen.rf.gd/vorimijevimure.pdfIn PDF document text
    • https://626fb5af-1d67-41cb-86ce-204163677ff0.filesusr.com/ugd/9d869b_9a80ca7df5cf43fbabf34768df37c70c.pdf?index=trueIn PDF document text
    • https://be56f97b-0727-4a8e-a141-4155b83e75ac.filesusr.com/ugd/5034d0_730ce6bf0f20406dac55a18d8436829a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6099045-315a-4f12-aa21-a0bc1d4bf551/11231228637.pdfIn PDF document text
    • https://a179b4bb-f9e1-4b0b-8685-f881d2afde68.filesusr.com/ugd/0fdb6d_47b593f0d8e7487abf33768447e8ba13.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/86f8e8cf-06e6-412b-935d-259bc536cd3e/81730312275.pdfIn PDF document text
    • https://8eeb1f0a-0cdd-4c66-98a4-83777b49fb54.filesusr.com/ugd/64f9d2_bc6442465d5b45a7968f2f9c8a231165.pdf?index=trueIn PDF document text
    • http://nesenavepino.epizy.com/82856096408.pdfIn PDF document text
    • http://suzogoga.epizy.com/nugugubupawafoziw.pdfIn PDF document text
    • http://desejiboferade.rf.gd/cengage_chemistry_neet.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_off0000f9a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A2 5132 bytes
SHA-256: 14d20e1f55462e2a3274a601a9d3d109ff10dee3834298230847d96fc3d823d3
font_01_sfnt_off00010aff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFF 10784 bytes
SHA-256: 867157556279508338d3e4a14a26c85b372b48db7ce2baf8d397512ec79a30ae

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