Malicious PDF — malware analysis report

Static analysis result for SHA-256 e96840e0216eabec…

MALICIOUS

PDF

71.7 KB Created: 2021-02-26 00:25:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: e02ff86c0fbea6b43f9232bda4f111ca SHA-1: 02b602ffc383319f0d5bca1447de16fd71fb99b9 SHA-256: e96840e0216eabeca6da829a9add1103a6a8992cdfb22286a1898999051a1f5c
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV and an ML classifier as malicious, containing numerous embedded URLs that point to disposable hosting and link farms. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the presence of multiple external URIs and the overall structure strongly suggest the document is designed to redirect users to malicious sites.

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 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://jacksth.ru/award?keyword=glacier+bay+faucet+sprayer+repair PDF link annotation
    • https://cdn.sqhk.co/xapejinogum/jjghFji/85830789127.pdfIn PDF document text
    • https://lidovoji.weebly.com/uploads/1/3/4/3/134313359/7652314f8da6.pdfIn PDF document text
    • https://vojawozusuv.weebly.com/uploads/1/3/1/1/131164351/142db6ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450034/normal_5fe2c8c639384.pdfIn PDF document text
    • https://nakubinigana.weebly.com/uploads/1/3/1/3/131379761/2196442.pdfIn PDF document text
    • https://xejotonevuxujuj.weebly.com/uploads/1/3/1/3/131379732/984846.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427820/normal_5ff34f95d2198.pdfIn PDF document text
    • http://mainsale.pro/common_bacterial_infections_in_catsy00dt.pdfIn PDF document text
    • https://cdn.sqhk.co/tedalome/H8jfhi3/58298763127.pdfIn PDF document text
    • http://gakukuketisalum.scienceontheweb.net/xivakirelulurumarupek.pdfIn PDF document text
    • https://selokifasafu.weebly.com/uploads/1/3/4/3/134383977/0a77dda6.pdfIn PDF document text
    • https://cdn.sqhk.co/puxedimuwo/3jbXUr4/slingo_slot_machines_las_vegas.pdfIn PDF document text
    • https://gefivepuli.weebly.com/uploads/1/3/4/6/134620723/jajodejokagosenemag.pdfIn PDF document text
    • https://cdn.sqhk.co/wijelukifap/gejjjH1/operation_anka_mod_apk.pdfIn PDF document text
    • https://fevujuwevu.weebly.com/uploads/1/3/0/8/130813851/2346256.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dbf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF6 5280 bytes
SHA-256: 500c3f2574ffe4f119d6d4ffbf1155d70bae480ab892cadb14bb5cac9d815525
font_01_sfnt_off0000ee0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0B 10532 bytes
SHA-256: 65260c7027190a2a0ad8386e7350953e60248d16b9036ebb2971f34773effa9b

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