Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f85de598bb74a4…

MALICIOUS

PDF

79.6 KB Created: 2021-03-29 22:48:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: df69589ba00c132e5df6f26233499398 SHA-1: 60af1421b41505458e31d3375007d187689e90cb SHA-256: 07f85de598bb74a4b52e09c657500c0353dedcb4726f9742d804c41a4cd3f446
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, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates this malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/strik?utm_term=how+much+is+fallout+4+dlc+xbox+one PDF link annotation
    • http://urott-hu.com/lexus_es300_oil_type_1993ww95q.pdfIn PDF document text
    • https://cdn.sqhk.co/mowogibewu/jhhejcy/daily_cleaning_checklist_for_daycare.pdfIn PDF document text
    • http://tokigarodam.22web.org/refuwasunakatel.pdfIn PDF document text
    • http://tunirugorejef.iblogger.org/dua_istikhara_for_marriage_with_urdu_translation.pdfIn PDF document text
    • https://cdn.sqhk.co/lewewita/gjjghaD/bhagavath_geethai_in_tamil_free.pdfIn PDF document text
    • https://cdn.sqhk.co/dujejigin/jbSge92/badminton_tournament_planner.pdfIn PDF document text
    • http://meetsucre.pro/sony_rx100_iv_underwater_reviewtldfj.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/gheJUja/sofenikaxaxenalif.pdfIn PDF document text
    • https://cdn.sqhk.co/bijukipuj/iaFchdv/gangstar_crime_city_game_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/eyShbi6/donkey_braying_sound_mp3.pdfIn PDF document text
    • http://like-store.site/the_red_pyramid_chapter_3_summary02due.pdfIn PDF document text
    • https://cdn.sqhk.co/bemaxopig/y8hdhhL/74201931739.pdfIn PDF document text
    • http://eglo.club/68612719316qxd0b.pdfIn PDF document text
    • http://kugewezebuvigiw.mygamesonline.org/76872338650.pdfIn PDF document text
    • https://cdn.sqhk.co/dudumadopole/izbPjj7/24500688535.pdfIn PDF document text
    • http://misifebofol.mywebcommunity.org/bank_po_and_clerk_syllabus.pdfIn PDF document text
    • https://cdn.sqhk.co/vumusokutil/xm3icic/weather_near_me_tonight.pdfIn PDF document text
    • http://1xbet-football.fun/97583397716pimpf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://matewodupenes.epizy.com/golezuzasagifatapasi.pdfIn PDF document text
    • http://gadusevi.rf.gd/last_reported_case_of_polio_in_australia.pdfIn PDF document text
    • http://bowedaliwerox.rf.gd/14206799807.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_off0000f9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B0 5516 bytes
SHA-256: 7138b585385f843f48dc8265fd577788deefc9d95e9408d02bf2b832f6ff3489
font_01_sfnt_off00010c6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C6A 10708 bytes
SHA-256: 4fb3f05d167f884b504c2f529e761b23130e971b6e23c2f9151b5118d1ba05b3

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