Malicious PDF — malware analysis report

Static analysis result for SHA-256 910f75506b0d68bd…

MALICIOUS

PDF

81.9 KB Created: 2021-05-27 23:49:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cba1d6c01100f7262e80e90df24d37e0 SHA-1: 729ec14042c4c1bca4f1e92fe61f59007a967529 SHA-256: 910f75506b0d68bdb14a2f185be1d6b327ab35e55281a23861da999a556afb89
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 0.9996

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://mezovuduw.ru/strik?utm_term=shrek+story+book+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383918/normal_5fd3182a2e914.pdfIn PDF document text
    • https://fatatovol.weebly.com/uploads/1/3/4/7/134707957/74504461e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481271/normal_5fe0e33e985f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411479/normal_5fe36504071c0.pdfIn PDF document text
    • https://noribiri.weebly.com/uploads/1/3/5/3/135347041/3782925.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389804/normal_5ff711d801b29.pdfIn PDF document text
    • https://gerulelib.weebly.com/uploads/1/3/0/9/130969354/nabuvorok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376852/normal_6044cb68b355b.pdfIn PDF document text
    • https://kojulijorivo.weebly.com/uploads/1/3/4/3/134329781/2388749.pdfIn PDF document text
    • https://betedodokadez.weebly.com/uploads/1/3/4/8/134882186/9f0b82.pdfIn PDF document text
    • https://gujaninarenuwin.weebly.com/uploads/1/3/4/3/134319279/tuwofadesiduwi.pdfIn PDF document text
    • https://wovuxekas.weebly.com/uploads/1/3/4/3/134379471/852839302.pdfIn PDF document text
    • https://newakikijako.weebly.com/uploads/1/3/4/3/134351088/5529536c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446170/normal_5fedfd0945982.pdfIn PDF document text
    • https://ravawesasusede.weebly.com/uploads/1/3/4/5/134517270/c294d95f3fec6.pdfIn PDF document text
    • https://duditoza.weebly.com/uploads/1/3/2/3/132302736/pofufuvuki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383470/normal_605843c438cae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379049/normal_606be53fd307b.pdfIn PDF document text
    • https://xemudimiju.weebly.com/uploads/1/3/4/8/134861016/punirigizerukinuxok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/860b1ddc-be4d-4845-afcd-4c48b59584d2/octopus_apk_old_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f064cec-bba4-431a-b88e-b05b5bd1d464/foduwedoxotirab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdffa071-c3bb-4421-b0ed-5b485526f4d6/jotarerizugoz.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_off0000fe26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE26 5296 bytes
SHA-256: 76a4ba3c5b73315d9baf47b879be46871f897194e8dc9b8205d3b6ba9acff922
font_01_sfnt_off00011026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11026 12440 bytes
SHA-256: ca5133518d006f104d8f5c0d8a5dc194abb52efd1938155d455cf956b5bc472b

Open this report in the interactive analyzer, or submit your own file for analysis.