Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f34aa0757ff5ec0…

MALICIOUS

PDF

75.3 KB Created: 2021-03-30 09:29:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: eb04fa7fbcbd0a0972f9e5d26396af7f SHA-1: 7faebcd9707e8e6c9a1c8b0b49c250ca4b619672 SHA-256: 7f34aa0757ff5ec09567949c34c3002f11826f58fde8c721cec6c92aa436dfa2
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The primary URL, 'https://jumiwimov.ru/wix?keyword=game+pokemon+3d+mod+apk', is presented as a search result, indicating a lure to trick users into clicking. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://jumiwimov.ru/wix?keyword=game+pokemon+3d+mod+apk PDF link annotation
    • http://meetcabinets.xyz/36486746528movqc.pdfIn PDF document text
    • https://cdn.sqhk.co/joxesinejag/BhjeQhg/gods_of_rome_character_stats.pdfIn PDF document text
    • https://cdn.sqhk.co/mesafovojifo/gdfifih/hearthstone_duels_decks_paladin.pdfIn PDF document text
    • https://cdn.sqhk.co/wofazexej/igdjgdh/marketing_strategy_examples_for_new_product.pdfIn PDF document text
    • https://cdn.sqhk.co/penuvipaw/mjedifz/biochemistry_lehninger_ebook_free.pdfIn PDF document text
    • http://zavolofa.mygamesonline.org/84765878745.pdfIn PDF document text
    • https://cdn.sqhk.co/reruzemafow/dhjegcR/slotomania_app_for_android.pdfIn PDF document text
    • http://fevofawemuwa.medianewsonline.com/neoliberalismo_en_honduras.pdfIn PDF document text
    • http://ru-payment.casa/vampire_diaries_season_8_episode_13_soundtrackp7a5e.pdfIn PDF document text
    • https://cdn.sqhk.co/wekonexiw/arhhPhg/soccer_champions_game_unblocked.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f19d2187-ce67-4d04-8798-eef694565169.filesusr.com/ugd/bd4746_f69c1a6f060b45dd92665a32aa3bf874.pdf?index=trueIn PDF document text
    • https://237a2310-9536-43ad-add1-fe73b840a51a.filesusr.com/ugd/8b319d_db33e6d0e1d442b8b30163504d3fdc56.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/eff0ffe7-7b60-4190-9a62-b4e731fa3cd9/toro_timecutter_ss4235_parts_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d688a88-bb34-4906-98c7-aeb0c10b9b35/critical_thinking_synonym_and_antonym.pdfIn PDF document text
    • https://1347de4c-4e54-429a-b84c-372e60bc5a2b.filesusr.com/ugd/6c98bc_25c0aba3fea545009658bc1a1b30744e.pdf?index=trueIn PDF document text
    • https://713ff9a1-ee4a-4317-942a-697bf1b0458e.filesusr.com/ugd/e2f197_96c084ae58f94084812501ef97c5849e.pdf?index=trueIn PDF document text
    • https://0dc5fd1c-b354-4e5b-9ccd-45395e8994ed.filesusr.com/ugd/f79e8d_01baa0ed0fa049ba939f4590c946ac21.pdf?index=trueIn 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_off0000e742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE742 5060 bytes
SHA-256: 5c4c8b9735196fa6e3e887d4628de3069f7ae4adab3e078d50015e93eb6a7d64
font_01_sfnt_off0000f872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF872 11880 bytes
SHA-256: 8576864fb584d2d04106f2be267fa979558772c7a615bbfc389bbfc8de44a559

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