Malicious PDF — malware analysis report

Static analysis result for SHA-256 287a37e1a51e4efd…

MALICIOUS

PDF

80.1 KB Created: 2021-04-06 02:31:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 530feba031f2ad6a51e7161bbc4eaaf3 SHA-1: b6c37f999ff5d246f97449d9ee536b6e0c2d18bb SHA-256: 287a37e1a51e4efdae9b5d3bd4f7989ad400f49bb0794604098f90d7a4b944be
134 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable hosting, suggesting a link farm designed to distribute malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high volume of links on low-reputation domains, further supporting the phishing and download lure attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ponafet.ru/123?utm_term=wedding+congratulations+card+template+free PDF link annotation
    • https://cdn.sqhk.co/jaxabofapuw/hagjdif/dream11_ludo_game.pdfIn PDF document text
    • https://cdn.sqhk.co/busoleva/LGP2ghU/superhero_logos_hd_wallpaper_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nipigagavadu/jidFjeF/xtreme_jet_boat_ibiza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366625/normal_60343b0415fe8.pdfIn PDF document text
    • https://cdn.sqhk.co/suwuwewazaka/ehgVN2B/69447516969.pdfIn PDF document text
    • https://cdn.sqhk.co/toriwogadej/05EfgcW/android_backup_app_data_to_google_drive.pdfIn PDF document text
    • https://cdn.sqhk.co/zimamoko/n453hbr/11999080110.pdfIn PDF document text
    • https://cdn.sqhk.co/velabolo/0jeVsjh/24138426905.pdfIn PDF document text
    • https://cdn.sqhk.co/samumosoxivi/nRdjfif/44880624533.pdfIn PDF document text
    • https://cdn.sqhk.co/wixefawoz/dRIsMhh/basketball_rules_time_in_key.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413125/normal_5fd7ef624493a.pdfIn PDF document text
    • http://nezatarofarix.getenjoyment.net/baixar_creator_portugues.pdfIn PDF document text
    • https://cdn.sqhk.co/vekokoze/zzjhXif/briova_specialty_pharmacy_forms.pdfIn PDF document text
    • http://tejovotemikodes.getenjoyment.net/pafov.pdfIn PDF document text
    • https://cdn.sqhk.co/pobumepova/hhgfhaK/washington_state_hockey_jersey.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/the_other_side_of_the_door_2016.pdfIn PDF document text
    • https://cdn.sqhk.co/lasanamemego/jidjajd/wafufatemivowazizugab.pdfIn PDF document text
    • https://cdn.sqhk.co/labifikup/gkOrJhd/xafozizetedoxawuwesi.pdfIn PDF document text
    • http://gazajujana.mygamesonline.org/hallmark_movie_unleashing_mr_darcy_cast.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485173/normal_6057e4226e56c.pdfIn PDF document text
    • http://vijexibat.mywebcommunity.org/unitedhealthcare_dental_provider_customer_service_phone_number.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://totuxivez.onlinewebshop.net/ansys_tutorial_for_civil_engineering.pdfIn PDF document text
    • http://dipagepe.atwebpages.com/38103583706.pdfIn PDF document text
    • http://fusozevukatamir.atwebpages.com/98224779241.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_off0000fa9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9E 5488 bytes
SHA-256: 8f84b237b78db81f938f7365f8ad16ecb7a7053d9ad1b19bfe39f6e4d5bd9d51
font_01_sfnt_off00010d44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D44 10972 bytes
SHA-256: 4037d06159fece7bf35d2fb295878b241d1f2cc7d7f2d6d3ca2113aabc922432