Malicious PDF — malware analysis report

Static analysis result for SHA-256 318d0f55e49258bd…

MALICIOUS

PDF

76.3 KB Created: 2021-04-08 06:26:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9e1e336f2d35c1b6526116c837293ee8 SHA-1: 5bf39c8b9ce96298936e978cf5e4e26c1c2d30a7 SHA-256: 318d0f55e49258bd10f0eaadaca69e3acc7a05830294e15c6f9813711f6d8b9f
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://pelibifir.ru/strik?utm_term=book+of+cain+bible PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446647/normal_6055ab14d9fa3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377125/normal_6013250d1266d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498994/normal_604ac7bea242b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mevedokepovi.epizy.com/ruzelig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccce447c-0e69-4b16-80f1-31e81140896a/besegokulibob.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/41702265521.pdfIn PDF document text
    • http://galukovo.epizy.com/23802057212.pdfIn PDF document text
    • http://remavamabemasa.rf.gd/7980799443.pdfIn PDF document text
    • http://lamupimifuban.onlinewebshop.net/posopotal.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/bodaremezolenozawuto.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/16863476329.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/bererugelanivasawizala.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/marvel_spider_man_comic_online.pdfIn PDF document text
    • https://ddb1515c-011f-4d6c-9a6c-b305a2039a85.filesusr.com/ugd/477ac5_4dbe035afc5841188a41dfd4ab80eceb.pdf?index=trueIn PDF document text
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_0112af7d7a4c4487bd9d580dd5fd83c2.pdf?index=trueIn PDF document text
    • http://romakilax.myartsonline.com/tratamiento_nutricional_para_hernia_hiatal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db88ab3b-816c-402b-972f-e2046d81e378/26784511091.pdfIn PDF document text
    • http://lukafimagog.atwebpages.com/nugukixogifaze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e55c04e1-a0b2-482f-bc4d-31810aa081fb/derasedotisorizakerinok.pdfIn PDF document text
    • http://lafeseg.rf.gd/tristana_guide_build.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_off0000ed45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED45 4856 bytes
SHA-256: e3d9fc2ea947a075b8ae70eb83dcf7a1f025470643173bfa2ff13064a1f579ea
font_01_sfnt_off0000fdeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEB 11252 bytes
SHA-256: baae0cf593206642feb05b1fd450dabebb366ca962291c83eee1f1c27bba3f82

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