Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe27fc214b81d2ba…

MALICIOUS

PDF

91.1 KB Created: 2021-04-26 18:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 91bd033f3e640b9450b9ac0e37c7a31a SHA-1: 127d9ef5aa756e9bb0fedfd75509b4f66924bc60 SHA-256: fe27fc214b81d2ba64ad36fe4dc88c6f4772b47dcbb450ff977b58d91f0c62ad
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://jottigo.ru/strik?utm_term=night+angel+trilogy+book+1+review PDF link annotation
    • http://dvigatel.guru/savage_tide_adventure_pathmuac5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423750/normal_5fd67e4c6219a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469850/normal_602c017fda0d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530151/normal_600d5655c79a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406208/normal_6041861338749.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383795/normal_6033c398596ed.pdfIn PDF document text
    • http://magnetfix.store/mepukifupewagolamuzazewabtgsc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498392/normal_60415d5bc16d8.pdfIn PDF document text
    • http://future-techno.ru/visumavodegujizlpezk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380883/normal_604e88501218d.pdfIn PDF document text
    • http://jewlgems.com/archer_hotel_florham_park_florham_park_nj_07932ot5rm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459185/normal_5fea2e7b68bd1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451575/normal_5febd3c28a703.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/fosalizuzu/55550695465.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/sevibevevakuwipelofubomug.pdfIn PDF document text
    • http://galusuvojames.epizy.com/les_miserables_staged_concert_cast_list.pdfIn PDF document text
    • http://mumakup.rf.gd/5672005955.pdfIn PDF document text
    • https://d09251a9-b09e-4077-8ccb-24037f005f7b.filesusr.com/ugd/a6ce17_c733afc6b7c2492f80cd30b551fdd17a.pdf?index=trueIn PDF document text
    • https://63aa7d51-6c54-48cc-ac87-b710a0da19c3.filesusr.com/ugd/c8d394_064dd5843d5c4f10afb9df574658ae6b.pdf?index=trueIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000128af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128AF 5248 bytes
SHA-256: fa7bfda44ddcdd6c8037ece599baf2b20a36a2bb10b054c32e1504e565c6fb54
font_01_sfnt_off00013ab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AB2 10928 bytes
SHA-256: 4b4e1ca261879a8e9dca054ec22f9a02bc4f7fa7290eccd5aec0c9d40a677ab8

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