Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b540c20d0f584fa…

MALICIOUS

PDF

75.3 KB Created: 2021-04-05 23:01:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 60c67664b323701e221c4e974ba2ed37 SHA-1: e95b44c932e9db7680eca97b760bffa10c76ee70 SHA-256: 6b540c20d0f584fa16f4ec8de7f7e552bfc81ecdba8643bcc52b79aa9ab935a2
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one prominently featuring a car model and price, suggesting a phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, often associated with malicious activity. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://leonvi.ru/strik?utm_term=maserati+granturismo+2020+price+philippines PDF link annotation
    • http://xodinazafomizi.22web.org/administrao_hospitalar_livro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385437/normal_60276d8ac570d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480756/normal_601a329403f5c.pdfIn PDF document text
    • https://cdn.sqhk.co/wejafivelij/giidehg/get_drive_ahead_guide_tips_and_tricks.pdfIn PDF document text
    • https://cdn.sqhk.co/lovaxixifew/jdfjh8C/sizuwipifudedolagatotepe.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwufupi/qghigFL/the_sims_2_cheats_gamecube.pdfIn PDF document text
    • https://cdn.sqhk.co/pasojixaju/jjiejf8/59252901975.pdfIn PDF document text
    • http://zisezamerares.mygamesonline.org/wutevoramovowovirirag.pdfIn PDF document text
    • https://cdn.sqhk.co/dewavasese/fXidjbH/hodder_education_foundation_maths_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/koletexun/R28T3id/singing_lessons_near_me_for_adults.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/iieRidk/besopa.pdfIn PDF document text
    • https://cdn.sqhk.co/wabasenenem/lgfOicM/final_fantasy_iii_psp_job_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387031/normal_601c69dbc1ca3.pdfIn PDF document text
    • https://cdn.sqhk.co/wogokodu/ZTid6hg/scrabble_word_finder_with_7_letters.pdfIn PDF document text
    • http://dodabefokibejo.22web.org/feniwit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476446/normal_60632c91b2aa5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385635/normal_5fda6038ec603.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://vubelifijam.atwebpages.com/boveduposuxuxoleneb.pdfIn PDF document text
    • http://watawazorino.rf.gd/xsl_file_template.pdfIn PDF document text
    • http://pejonoma.epizy.com/evidence_based_medicine_toolkit.pdfIn PDF document text
    • http://fikenojidukozo.rf.gd/personality_development_quiz.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_off0000d93c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD93C 5508 bytes
SHA-256: abed74c16def7d74407546e4814709ea064cc853e3f082ad5d24c8b7d7b35173
font_01_sfnt_off0000ebc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC5 11556 bytes
SHA-256: 4c7ffd5ca3b05118b09f186845ae1dd3467974f4cc4e61b6bc07c9eed0a350ab
font_02_sfnt_off00011194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11194 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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