Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e60203e3b240b60…

MALICIOUS

PDF

78.1 KB Created: 2021-02-24 12:49:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1e85d21acf757e068718cae2f0bf5e4f SHA-1: 7148e35096fac77322b9e60d1330f336d454243a SHA-256: 4e60203e3b240b60aa30e79ffc4d1b35948bc65c64bc3453709a4cf30401a6f8
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The document body is heavily obfuscated, but the presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate a strong intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://druttle.ru/wb?keyword=icmr%20nutrient%20requirements PDF link annotation
    • https://jaluwaxigesife.weebly.com/uploads/1/3/4/6/134640648/aa6c45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407729/normal_5fcb76471e432.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421217/normal_5ff7917ed2178.pdfIn PDF document text
    • http://mexicotop3.xyz/the_authority_of_the_believer_billye_brimhcjo8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454303/normal_602b5dc730095.pdfIn PDF document text
    • https://murunabijijot.weebly.com/uploads/1/3/5/4/135401069/koxedirapeze_gefeponifut_milotobadug_mamamawezube.pdfIn PDF document text
    • http://wukosemat.22web.org/third_person_shooter_android_offline.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403819/normal_602f9958bb6fd.pdfIn PDF document text
    • http://vsspb.ru/how_to_calculate_total_flow_timeausuh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485704/normal_6015fc4ea70d4.pdfIn PDF document text
    • http://stepka2016.xyz/xejopaxss7km.pdfIn PDF document text
    • https://zemutixo.weebly.com/uploads/1/3/4/8/134865820/ad40763f490a383.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386621/normal_5ff20d8a0d0f4.pdfIn PDF document text
    • http://janetoxanonim.22web.org/wopete.pdfIn PDF document text
    • http://carluxepaint.site/the_ice_dragon_fanfic_ao3qax5z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379486/normal_5fce90920a968.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jefebewo.epizy.com/69684429521.pdfIn PDF document text
    • http://tirodubixuvix.epizy.com/14634944187.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/chikati_gadilo_chitha_kotudu_full_movierulz.pdfIn PDF document text
    • http://nesitojogosew.epizy.com/easy_vegetarian_recipes_for_beginners_indian.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/adobe_audition_noise_reduction_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/kisijegolen.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/92408433160.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_off0000f784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF784 4764 bytes
SHA-256: e34df1757ee4bbd90d17ed7df90d789d16dfb1667f91327bc8e45d602fcd44ad
font_01_sfnt_off000107a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A8 10260 bytes
SHA-256: 731fef9dd6b05ba92654f97b79b8ac5b2016c198eaa7b41e3c95cc015c1ad3cd

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