Malicious PDF — malware analysis report

Static analysis result for SHA-256 b35b48918b2e2b24…

MALICIOUS

PDF

73.4 KB Created: 2021-02-11 22:00:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c6c27c47a9657fe0ec064a5a08370ab8 SHA-1: d2325d4c393a53b8de9829f0a4f9a4e0a6dfaed6 SHA-256: b35b48918b2e2b24e428dad66af0712051731d9d2ef3072c67eb4df7a7e3911c
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://baarspo.ru/wix?keyword=manual+honda+civic+si+for+sale PDF link annotation
    • https://cdn.sqhk.co/fusojafiza/gcgfije/14030503994.pdfIn PDF document text
    • http://drenajkrasnodar.ru/yousician_cracked_apk_redditejj5e.pdfIn PDF document text
    • https://cdn.sqhk.co/jovowosifo/ibUuhaK/charli_d_amelio_wallpaper_outfits_jeans.pdfIn PDF document text
    • http://superheatbelt.xyz/890577890720fgka.pdfIn PDF document text
    • http://dvertsoff.ru/2938296308jyjv2.pdfIn PDF document text
    • http://hangookoil.ru/22790424944912f.pdfIn PDF document text
    • https://cdn.sqhk.co/fudopalizew/hbhhCl2/digital_trends_portland_jobs.pdfIn PDF document text
    • https://fuzewejobedogu.weebly.com/uploads/1/3/1/4/131482867/nemusipegupa_fetemukidopo.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/tgcggmf/tonije.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bisazabe/januvibidutusekifujup.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/porsche_718_cayman_performance_upgrades.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/sogipuvan.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/abstract_lab_report_example_physics.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/aambala_movie_song_isaimini.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/fallen_sarah_mclachlan_sheet_music.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_off0000e14a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14A 5172 bytes
SHA-256: 09fc4b046eec0496766954c297fcaeaea19f5a5287c7b433d848f49059e94464
font_01_sfnt_off0000f2f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F0 11360 bytes
SHA-256: f0953b68268c6d5ff3a77a186537f549be3f09154eef89d41e8b3b2ffdde041e