Malicious PDF — malware analysis report

Static analysis result for SHA-256 3326d585f6dbe7fd…

MALICIOUS

PDF

86.6 KB Created: 2021-04-22 09:42:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8e639f71cd0f95fe1d7034335ada0508 SHA-1: 22db5477354ffad11ba4f3de3f2393d8dcd8fe64 SHA-256: 3326d585f6dbe7fda199d30da8e084ccaa44a9b89aed49f7ea69a4823a3842cb
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 or trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'maypoin.ru' and containing a 'contract law basics singapore' query parameter, suggesting a lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, further supporting a malicious intent. No scripts were extracted, but the overall structure and URL findings point to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://maypoin.ru/strik?utm_term=contract+law+basics+singapore PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4419626/normal_5fdf151fc95e4.pdfIn PDF document text
    • https://cdn.sqhk.co/dudumadopole/jbjjQic/news_viral_video_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_6015a062e0fd8.pdfIn PDF document text
    • https://cdn.sqhk.co/sajatanugeg/hjhdeGN/epic_games_support_twitter.pdfIn PDF document text
    • http://rumurel.mywebcommunity.org/declaration_de_chiffre_d_affaire_auto_entrepreneur_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476010/normal_5ffb8efd68f3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_6065cb5f8063d.pdfIn PDF document text
    • http://rojibitakuvekuw.scienceontheweb.net/forming_abstract_nouns_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/vizoxaxijojo/Mhbhf85/diy_electronic_projects_for_adults.pdfIn PDF document text
    • http://silkhfig.bid/69968116823b6ptg.pdfIn PDF document text
    • https://cdn.sqhk.co/zotiperugi/jf6EqKb/at_t_tv_now_customer_service.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447649/normal_6069855190274.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_602f4cd9af076.pdfIn PDF document text
    • http://hookup153.online/brawl_stars_private_server_apk_download_2020n29pa.pdfIn PDF document text
    • http://suwadebizon.mywebcommunity.org/noun_phrase_analysis.pdfIn PDF document text
    • https://cdn.sqhk.co/zupitefa/crBhaid/balilesunodulajerat.pdfIn PDF document text
    • https://cdn.sqhk.co/fovugemut/cgcgIN8/formulir_klaim_asuransi_kesehatan_axa_mandiri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392218/normal_604dab644d4ba.pdfIn PDF document text
    • https://cdn.sqhk.co/jefutubup/9ciahge/kavujezomigematemigesug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484380/normal_6045bc7c2607f.pdfIn PDF document text
    • http://detonicufficiale.website/6135017247gw8ps.pdfIn PDF document text
    • http://leftoutclub.com/how_high_do_you_put_a_bat_house_in_a_treeol8rz.pdfIn PDF document text
    • http://jozipuvuwuzaj.mywebcommunity.org/pefasapefewubisefuvaj.pdfIn PDF document text
    • https://cdn.sqhk.co/zafazegig/4qZjhzF/asma_gina_2017_espaol.pdfIn PDF document text
    • http://healthytrands.com/romantic_love_whatsapp_status_mp4tzdk0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://seroroxunabolu.onlinewebshop.net/20308070368.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_off0001129d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129D 5240 bytes
SHA-256: b4ec9745bdb0e619492617292835dd94b23551a078e46ff4106be9de09472b58
font_01_sfnt_off00012485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12485 11968 bytes
SHA-256: ab94096ce4cbe41e9c00c9d66b91abff44700758e8bdf0db26c3f25a010e1db5