Malicious PDF — malware analysis report

Static analysis result for SHA-256 333d171e34488461…

MALICIOUS

PDF

75.6 KB Created: 2021-02-19 18:40:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 321040f5f9db514309818198b1060961 SHA-1: 5527d5c9bf353db053fcb5df428dc7fa02172ab7 SHA-256: 333d171e3448846124d5ed6da06c5bec157443c40a91f22358b57d2a8761e876
184 Risk Score

Malware Insights

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

The PDF contains embedded URLs that point to known malicious redirector infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, suggests a lure related to Google Maps, likely to entice users to click the malicious link. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=how+to+add+road+google+maps In PDF document text
    • https://cdn-cms.f-static.net/uploads/4474448/normal_60176ae4a2475.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/yeehjjb/wefoxeja.pdfIn PDF document text
    • https://tadomowiwelam.weebly.com/uploads/1/3/4/7/134744739/7c77dc6799e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406216/normal_5ff0e4bf48507.pdfIn PDF document text
    • https://dalujukonuxuda.weebly.com/uploads/1/3/1/1/131163933/feremeliwogux.pdfIn PDF document text
    • http://prodson.space/7999503066565bcz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469359/normal_5fd813dca7202.pdfIn PDF document text
    • http://trylait.pro/pujexubusovefovewokinamaljdeol.pdfIn PDF document text
    • https://komomofuxuz.weebly.com/uploads/1/3/4/4/134494735/9bbe8a8ba24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489977/normal_5fdc354b954e0.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/bQih9hb/57125861318.pdfIn PDF document text
    • https://cdn.sqhk.co/lajefage/bib7fgc/the_art_of_war_2000_full_movie_123movies.pdfIn PDF document text
    • http://1pokypki.website/resident_evil_strategy_guidehjno0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378836/normal_5fdfa68e37e2b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417140/normal_5fc7fc60bcf9c.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
    • http://kevakop.epizy.com/fuvumuviwijasarodib.pdfIn PDF document text
    • http://tuzipegubeluwo.epizy.com/esthetician_table_sheets.pdfIn PDF document text
    • http://kozusabupo.epizy.com/jogigekifuvosegomimefuse.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_off0000dafb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFB 4964 bytes
SHA-256: a27e68bc1efb5a36b830b74efbdaf77ed64e5731542c08ed21856580afc4c309
font_01_sfnt_off0000ebef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEF 12044 bytes
SHA-256: 3b9048bbb61cda92f229bd3644942e4107528291fa69ba9b3791e88f3eec0206
font_02_sfnt_off00011321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11321 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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