Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aff4c3459148971…

MALICIOUS

PDF

79.6 KB Created: 2021-01-24 00:42:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ac00044e8fb60a77c8e1fdf146568e6b SHA-1: f27495ca40c32c45c3c413b78e2b71f3769e922d SHA-256: 2aff4c3459148971bd8fbac8a06f236e0aea5aa519c7da9279ca50c565801336
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a link farm, with the primary URL being a suspicious domain. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/123?utm_term=actron+cp9135+link+error+ford PDF link annotation
    • https://site-1173730.mozfiles.com/files/1173730/frayer_model_vocabulary_template.pdfIn PDF document text
    • https://gezagijuxeson.weebly.com/uploads/1/3/1/8/131872295/5086191.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486374/normal_5ff09430c13b2.pdfIn PDF document text
    • https://pipenibeteza.weebly.com/uploads/1/3/4/5/134508730/xinoxugapodefut.pdfIn PDF document text
    • https://cdn.sqhk.co/sejixikerut/che8jid/93508584361.pdfIn PDF document text
    • https://site-1178101.mozfiles.com/files/1178101/sitidunarufit.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/aXhbgc3/brain_balance_reviews_st_louis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402710/normal_5ff6637c9a24f.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/cugfJm2/diwasunarofapevugur.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzudulo/gf4idgh/benafitadiwab.pdfIn PDF document text
    • https://site-1171753.mozfiles.com/files/1171753/17780271953.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463810/normal_5fedd81b9fd59.pdfIn PDF document text
    • https://cdn.sqhk.co/nujidegowupi/jQodihO/puzzle_piece_emoji_instagram.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/hCjcYge/48122177577.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465705/normal_5ff15bc5233b2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vigevot/3360558747.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/my_talking_angela_cheats_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/zadegesibanixefemeno.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/guidestone_member_login.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/53363562227.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0E 5096 bytes
SHA-256: 2f21798dcda9a653852957f3327c79b3501f896a6815c0bc396a87b090343d3b
font_01_sfnt_off0000fc78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC78 11296 bytes
SHA-256: 1149b12251ddaf0d14aa2887c886ab7c19eb78d3d4c56ea51c86257599de2a5a
font_02_sfnt_off0001232e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232E 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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