Malicious PDF — malware analysis report

Static analysis result for SHA-256 10af881f3dedaa4c…

MALICIOUS

PDF

79.9 KB Created: 2021-04-22 14:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d9425b8c9851cbfd3c5b74247c06e0b SHA-1: e3ff671e707b2cdc6bd9b12ebe78ac956a7f38e7 SHA-256: 10af881f3dedaa4cd19cad0978077abb5567c7eaf533934eca44b83674631b56
156 Risk Score

Malware Insights

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

This PDF document contains numerous external links, a common tactic for phishing or distributing malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. The primary malicious URL identified is https://xezojetit.ru/strik.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=camp+chef+zg+pellet+grill+cover
    • https://pimakesoxokozo.weebly.com/uploads/1/3/4/0/134041299/popaverimibaden-wonuguzavixabat-xatutanef-lipipoxozes.pdf
    • https://suxawadukisefi.weebly.com/uploads/1/3/4/7/134713915/vuxobosabowajoxevur.pdf
    • https://fapotuseji.weebly.com/uploads/1/3/4/7/134712372/kixevuwuvaduxozaj.pdf
    • https://tarivoda.weebly.com/uploads/1/3/4/6/134693378/gigedipawajiseb-baduj-fewosabuwevubo.pdf
    • https://jumolixebeze.weebly.com/uploads/1/3/4/3/134352805/5606377.pdf
    • https://bigimegena.weebly.com/uploads/1/3/1/4/131438437/vofululokukavo.pdf
    • https://padexalexip.weebly.com/uploads/1/3/4/2/134234572/b02adc7e99926.pdf
    • https://dexasarejujevi.weebly.com/uploads/1/3/1/4/131454537/jetate-sonovotudokuw-zugudoketo.pdf
    • https://gekofixesijivex.weebly.com/uploads/1/3/5/9/135961820/40604c0.pdf
    • https://dikefurilixi.weebly.com/uploads/1/3/4/6/134684794/7088228.pdf
    • https://gizivesokopupa.weebly.com/uploads/1/3/2/6/132696604/xobesukuwuj_bewig_kivivulegodiwu.pdf
    • https://detubutil.weebly.com/uploads/1/3/5/3/135348338/kefem.pdf
    • https://veranaza.weebly.com/uploads/1/3/4/6/134665567/8e49cd.pdf
    • https://latewumopinigan.weebly.com/uploads/1/3/4/3/134313498/7712560.pdf
    • https://zevakevo.weebly.com/uploads/1/3/5/4/135400716/midep-natono-fobewetarew.pdf
    • https://goradexajegofip.weebly.com/uploads/1/3/0/8/130874122/pekagoso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d451e762-8e00-4155-9971-9512d28d2528.filesusr.com/ugd/b52961_7c776d6cb2494d9fbcbb2307f5aa8aed.pdf?index=true
    • https://72be5e1b-4d14-4335-96ee-88463f604c48.filesusr.com/ugd/57ecfe_3d805d4dc2f94377b31ae78c0e75e6b6.pdf?index=true
    • https://1e438cd7-6f3b-42ac-a97b-d13a75fa135b.filesusr.com/ugd/0c268c_60ae96634c4d4dd29be46dad0e93744a.pdf?index=true
    • https://0a37a3d5-a0bf-4e77-8ff5-6127fd08aefa.filesusr.com/ugd/6046c9_b99354f8bab14f398963a1ec3185a1ac.pdf?index=true
    • https://92923600-264c-4cb8-9d87-181083d4f0d6.filesusr.com/ugd/0bf43f_f1251ddda4b3493d96c21cd0fa9d47a0.pdf?index=true
    • https://8aa13d94-a051-4bfa-911d-5e7c2f772018.filesusr.com/ugd/382cc4_c2fd3a984c0743209f2b1d4665149367.pdf?index=true
    • https://e25b7b56-d8f7-44cb-9276-56428e53d1cc.filesusr.com/ugd/63f3e8_66c780747ebb4507b3f20471b38f7640.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f78b.bin
d6da67798d54b8d57db3ef0c29ec9a147e6c8ac2df6db716ff4165ab35cc72b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF78B 5268 bytes
font_01_sfnt_off0001095e.bin
ae278357b355a98b737d5d538ca3d47c0db7ef236d3e16356a1cd26c040f6d82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1095E 12076 bytes

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