Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f465bacf8481041…

MALICIOUS

PDF

76.8 KB Created: 2021-03-20 04:29:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e240faeb3fe16ed912035bf54618479c SHA-1: 144396670ce675e8d659cdbc6ab7c4bd4bb31e0a SHA-256: 9f465bacf84810413a34a18ca37daf07107c10a4849b38e043b8ee1a0577864e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://fokemale.ru/award?keyword=albinismo+en+ni%25C3%25B1os+pdf PDF link annotation
    • http://liolika-rsya.ru/liftmaster_error_codes_10_flashes3o562.pdfIn PDF document text
    • http://vertitribe.store/foxupajuvezoragufakeb4iu4y.pdfIn PDF document text
    • http://prizinsta365.online/73087660762njc5b.pdfIn PDF document text
    • http://copyrightshelpscenters.com/double_or_nothing_neopets_guideo74na.pdfIn PDF document text
    • http://vorecan.fun/suvovirefaju7ceve.pdfIn PDF document text
    • http://worldthailand.fun/laboratory_skills_checkup_4_identifying_errors_answersb0p5l.pdfIn PDF document text
    • http://lnstagram-helping-centre.com/77745422673mjlk9.pdfIn PDF document text
    • http://bioforce-co.site/kenmore_stacked_washer_dryer_reviewsh3xwu.pdfIn PDF document text
    • http://mobile-media.moscow/wodopojuwozuj3xcx.pdfIn PDF document text
    • http://pshcomonhere.xyz/688221384791w20j.pdfIn PDF document text
    • http://yandex-dostav.ru/nikon_p510_camerabh5uh.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/wejuvono/namedekejipunivogijagoji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec9e534b-1e2c-4ef3-af65-2fdd071b4fa3/xomumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c7acec4-7dbb-4ac8-969b-14e387d846b6/93238396886.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44753b18-b22f-4a44-b8a6-b7c3d0fe408b/47845476702.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/alcatel_lucent_8028s_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/35820826869.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d09ad9e-f4cb-49ec-bf8c-dd3b4b305918/communication_principles_for_a_lifetime_6th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3744f50-d5b0-4c95-b1fb-b57588ccd4f5/zubovadojuzusibapajezuved.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a6f22b7-9b6e-4942-bb03-66fb42bdcce6/best_4_person_hot_tub_for_the_money.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/uc_browser_vpn_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3144a99-d160-4586-8f40-978b14b351ba/how_to_describe_storms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f393432-db14-4d56-a462-c1deb35cc890/zamiweba.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_off0000edfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFE 5224 bytes
SHA-256: 7ffb8135c9d41b5c857f6508564a435e76828f9517fe0ab20bfd3271576a4caa
font_01_sfnt_off0000ff73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF73 11324 bytes
SHA-256: 6a437931e255e938baab8dce350ef269edada3827916cd92df53314438e5877d