Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7c9175d897c09c8…

MALICIOUS

PDF

79.2 KB Created: 2021-05-09 02:16:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b4b8e4810f7ce98bdde8d7a95eeb829d SHA-1: 14453fdb5f7657e31f2d5e5fe552233b46bd12e3 SHA-256: c7c9175d897c09c8e29360d819b846627b112eeb2eb279dbc61752b8c3c99381
156 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 0.9997

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://soxebez.ru/strik?utm_term=homelite+string+trimmer+starting+problems PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383805/normal_5fdd60e210ae2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465257/normal_604ae41c6935d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416495/normal_601d94e525f2a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444095/normal_5fca134b9ed3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404976/normal_6027154c44e96.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406463/normal_6005241626fd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416501/normal_6066ea46db856.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378604/normal_602838f2c5983.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458614/normal_5ff1e9af29ab1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e60c805d-b9e1-47fc-b045-983511e9ac1f.filesusr.com/ugd/116bb2_1ce3cc79134c4275b745c481973536cc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sasufufa/89257880322.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/different_types_of_birds_sound.pdfIn PDF document text
    • https://8ab1a2d5-e5b1-44c5-a28c-e09959565f0d.filesusr.com/ugd/eb712c_348ecb01125046acb8860252bccfca2f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/neporezofov/yeoman_warder_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/ryan_hilinski_injury_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/95699675261.pdfIn PDF document text
    • https://1058d175-53f8-4d86-9201-ae9c1fc74009.filesusr.com/ugd/62a633_c002b09be0864ab39937b2435ec26ef4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/5115156205.pdfIn PDF document text
    • https://eb72eaa1-ef55-40a3-a653-f6d21bccf295.filesusr.com/ugd/54913d_973dacfe90be4083a6300b84ded82b3f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/sedod.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/duvanefopalonoxewam.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 4

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_off0000f828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF828 5240 bytes
SHA-256: 26181d1e39b8ad8ee50d960e5cb440c01e8a527ce4fb708d7ae07d6e4d3798dc
font_01_sfnt_off000109dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DC 11092 bytes
SHA-256: 1934be157bb8a40e960bb5781b373a58d546d2e3093d3323e956f25561866c47

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