Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bfd12c290ca1c7d…

MALICIOUS

PDF

75.4 KB Created: 2021-02-18 14:51:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 989b9ecaa23bab1cd7d143781b9ce7e1 SHA-1: c0abda3d380ab3a310c98d74eff878becd3a08ba SHA-256: 3bfd12c290ca1c7d45a625f9d5a96b27585addcdf555f34e28f8657e0b023364
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/123?utm_term=what+is+the+most+valuable+monster+high+dolls PDF link annotation
    • https://cdn.sqhk.co/levowexesu/8iifoX7/tobijufesegoduluxavu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370055/normal_601adcbddacbe.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/cjdGTOH/maricopa_county_recorder_forms.pdfIn PDF document text
    • https://wogivanozo.weebly.com/uploads/1/3/4/5/134586267/kanibufuloxaxugu.pdfIn PDF document text
    • http://galajikimozupu.iblogger.org/firearm_background_check_form_virginia.pdfIn PDF document text
    • https://cdn.sqhk.co/gutipefu/87hhLOF/65198597998.pdfIn PDF document text
    • https://cdn.sqhk.co/foxidagon/vihgjcv/fox_racing_goggles_youth.pdfIn PDF document text
    • https://cdn.sqhk.co/bapulofuw/dodhfZx/epic_boss_fighter_unblocked_games.pdfIn PDF document text
    • http://tajavimisafom.22web.org/cryptocurrency_trading_guide_for_beginners.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nofulevar.epizy.com/xuragume.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/chitta_jaggi_sidhu.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/airplane_2_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/kovoze.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/6759502371.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/katemilojoke.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_off0000e8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E4 5452 bytes
SHA-256: ea5cb8d8a5591f21d371a1abc2744394e422a5cbf2dfea3f16199d6bad8daff5
font_01_sfnt_off0000fb4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4D 10416 bytes
SHA-256: 631ff865f44a3f92f4e6ece9f47a900e50722a5a9d308b85f22c43adfccb60c2