Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e3e60ba5b49e2d1…

MALICIOUS

PDF

75.8 KB Created: 2021-03-02 03:45:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a384866f06c40c04606181223d556870 SHA-1: 3653fbb6ace7b947c44368aa67bcf9b07d71f05f SHA-256: 0e3e60ba5b49e2d122d5b5badf2d5e7ed1e2a032d483c89cab41461fb2aca664
166 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous embedded URLs, with at least two identified as suspicious and potentially leading to malicious content. The PDF's structure suggests it's designed as a link farm, using invisible links to redirect users to external, potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://golowaki.ru/strik?utm_term=masterbuilt+30+digital+electric+smoker+cover PDF link annotation
    • https://cdn.sqhk.co/titabofasika/hhziegh/mevewukigojesepajumesogo.pdfIn PDF document text
    • http://bt-management.website/personality_disorders_bookmijhv.pdfIn PDF document text
    • http://fresh-ita.space/35764126674f4g4u.pdfIn PDF document text
    • http://giftcard-sale.store/the_rational_optimist_how_prosperity_evolves_p.sf8kc2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455390/normal_5ff7731c391dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413361/normal_5fdd3d139cf7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382771/normal_5fe922d0b0537.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/cBjejh2/70859940469.pdfIn PDF document text
    • https://cdn.sqhk.co/selugijibix/gBQYMEv/66697832765.pdfIn PDF document text
    • http://topdiscount.pro/nerabefapuaga00.pdfIn PDF document text
    • http://vixemifojetinag.sportsontheweb.net/how_to_become_real_estate_agent_in_mumbai.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459054/normal_5fe81e4cae5ad.pdfIn PDF document text
    • http://com-login8.xyz/bookworm_like_game_for_androidcduha.pdfIn PDF document text
    • https://cdn.sqhk.co/sopiloroda/eRWihcp/yandex_mail_domain_alias.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://wipovevoliku.epizy.com/ginujudolija.pdfIn PDF document text
    • http://sogefotatuledis.epizy.com/90990838400.pdfIn PDF document text
    • http://ripifozuj.rf.gd/event_organizer_website_templates_free.pdfIn PDF document text
    • http://vijanemafe.rf.gd/calculus_and_vectors_12.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_off0000db67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB67 5608 bytes
SHA-256: 32cb47b2e4aa5ecf177f155286ec0a0414027470df7650e267558957897f25af
font_01_sfnt_off0000ee7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7E 10888 bytes
SHA-256: b9ab4caf3805e7d1a4ff8f574e04983f9837fd57ed7bd726399b2ccf9628cde6
font_02_sfnt_off000113d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D5 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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