Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e14ff89cbd4bff1…

MALICIOUS

PDF

76.0 KB Created: 2021-03-01 19:58:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 773c43bac2a2e5336438bfb9dffa3340 SHA-1: d743c9b7462de6d131851fd8e24a805dbcb6bc89 SHA-256: 5e14ff89cbd4bff1c6b9b59ff328328673a1e47a56d06ffe13151e1e0c3b3a6e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates malicious intent. While no scripts were explicitly extracted, the presence of many external URIs suggests the document is designed to redirect users to malicious content, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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/123?utm_term=oscar+and+the+lady+in+pink+pdf+free PDF link annotation
    • http://zakewabo.scienceontheweb.net/gerund_exercises_for_high_school.pdfIn PDF document text
    • https://cdn.sqhk.co/siwemawatu/HOjchew/tegalisojonosurujoj.pdfIn PDF document text
    • http://copyright-rules-help.com/bewadavavotegoraduxajunuk6gzi9.pdfIn PDF document text
    • https://cdn.sqhk.co/lazemowul/Jk9KhcN/doriruvabubaxevozivojewu.pdfIn PDF document text
    • http://cookwellbakewell.com/kifojokagepozidiguzqvnal.pdfIn PDF document text
    • https://cdn.sqhk.co/jojojidatun/UjeE9z3/saduxor.pdfIn PDF document text
    • https://cdn.sqhk.co/telazaje/hjPDzpD/mastercraft_tires_axt2.pdfIn PDF document text
    • http://openplafond.xyz/tipefigasurafujoworoxemol0kx3a.pdfIn PDF document text
    • http://manovina.mypressonline.com/79539877142.pdfIn PDF document text
    • http://logoped-samara.ru/netgear_wndr3700_access_point_mode1ji45.pdfIn PDF document text
    • http://jofufunobek.sportsontheweb.net/author_of_whos_afraid_of_virginia_woolf_crossword_clue.pdfIn PDF document text
    • https://cdn.sqhk.co/bomumuxa/jjhjaV2/daxevamidoxasu.pdfIn PDF document text
    • http://douchehq.xyz/966599242857cjz4.pdfIn PDF document text
    • http://prod-fruit.space/vunovirizinwt54k.pdfIn PDF document text
    • https://cdn.sqhk.co/fabetojowuje/RhiHwje/horse_racing_3d_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kagumuzom/gigmUfb/49657692913.pdfIn PDF document text
    • http://copyrightnotice-ig.com/siforenitawulixzcwqp.pdfIn PDF document text
    • http://idealica-ufficiale.site/5687624594788dxu.pdfIn PDF document text
    • http://ukrinsure.com/28318452137n35qs.pdfIn PDF document text
    • http://igbusinessabouthelp.com/wallpaper_games_hd_android_darkojx6m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000eb77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB77 5436 bytes
SHA-256: e1266686acfb7ba6a2a96cd914f08f014d7f5f141e9f9f096e7b6e64e15a0d09
font_01_sfnt_off0000fdf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF7 11060 bytes
SHA-256: caf03952491e60546452bbffa78014cb6ec07cd51180d8896f47872bdd0f965c

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