Malicious PDF — malware analysis report

Static analysis result for SHA-256 12510e271a537a58…

MALICIOUS

PDF

70.9 KB Created: 2021-05-02 03:03:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: da7d1e993752d136fb3eacc0fbeda33a SHA-1: 5f07721cb9b03e047199ed2ffcd50bc97803c23f SHA-256: 12510e271a537a582335929321c236e9f3ebba8304e4dfa091bf5d181fcd3c2b
186 Risk Score

Malware Insights

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

The PDF file is identified as malicious by both ClamAV and an ML classifier, with critical heuristics indicating it's part of a large external link farm hosted on disposable domains. The document body, though heavily obfuscated, contains a lure related to a "Warhammer 40k space wolves painting guide pdf", suggesting a phishing or SEO manipulation tactic. The embedded URLs and the nature of the link farm strongly indicate an attempt to redirect users to potentially malicious sites or to manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/strik?utm_term=warhammer+40k+space+wolves+painting+guide+pdf PDF link annotation
    • http://giwapozolaleg.mypressonline.com/totaze.pdfIn PDF document text
    • https://dilazewinu.weebly.com/uploads/1/3/0/9/130969594/fopoverone-fifamu-zedotakilelom.pdfIn PDF document text
    • https://paxiguvemogi.weebly.com/uploads/1/3/4/3/134317910/kubelewodeb-kigojenasitog-zibeko.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477620/normal_600908903e5f1.pdfIn PDF document text
    • https://gomimujexewawid.weebly.com/uploads/1/3/1/0/131070583/5d87c597ff39.pdfIn PDF document text
    • https://mavakonagidesa.weebly.com/uploads/1/3/1/4/131483278/2272587.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393362/normal_606c0ad2370c2.pdfIn PDF document text
    • http://vifezitenof.getenjoyment.net/rca_atlas_pro_10_reviews.pdfIn PDF document text
    • https://vazanopika.weebly.com/uploads/1/3/4/8/134896022/suzemotujozuzev-nibeze-palosixubekezul-waluferakelobo.pdfIn PDF document text
    • http://kunepuvobimamin.medianewsonline.com/ash_wednesday_meaning.pdfIn PDF document text
    • https://kuwumezebuxe.weebly.com/uploads/1/3/4/1/134131528/8460063.pdfIn PDF document text
    • http://nipobudagese.mypressonline.com/17938870926.pdfIn PDF document text
    • https://zabidikigez.weebly.com/uploads/1/3/4/5/134594795/8af185688b37e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vumamuv.myartsonline.com/nisajikamegiton.pdfIn PDF document text
    • http://tigagatu.atwebpages.com/dominos_wisconsin_6_cheese_pizza_price.pdfIn PDF document text
    • http://lopakesuzuw.atwebpages.com/dbrau_bsc_chemistry_syllabus.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/59654792544.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/29932392642.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/wimomefinivanidilejukobuk.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD714 6028 bytes
SHA-256: 7e69e084eebd6615798723f5d4eb7bdc66ae40f456cac89e4009ea385349f505
font_01_sfnt_off0000eb97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB97 10184 bytes
SHA-256: 7a19615f52b6b5ac0971b41198e45e6738a870a7b6fa79be7f7e8207cd89bf23

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