Malicious PDF — malware analysis report

Static analysis result for SHA-256 86875fefdaba78ec…

MALICIOUS

PDF

72.4 KB Created: 2021-02-25 17:32:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 8d7ded8af244c1d17f06ec225da634c9 SHA-1: 69ad49c4a8a2b7d52ef8608295f3411972f54e7e SHA-256: 86875fefdaba78ec7cf904a433db4071a1a08d83fc1ebf8150faf9552fe60076
142 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains multiple embedded URLs, with one prominent URL pointing to 'baarspo.ru', suggesting a phishing or malware distribution attempt. The heuristics indicate the document uses urgency and download lures to trick users into interacting with these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://baarspo.ru/award?keyword=how+to+get+the+dog+filters+on+snapchat PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393181/normal_6024c353a43cb.pdfIn PDF document text
    • https://cdn.sqhk.co/litigoruf/ghfB4uy/dragon_evolution_world_mod_apk_android.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/h7QCKUH/sudoku_solver_online_6x6.pdfIn PDF document text
    • https://cdn.sqhk.co/jenotonolo/0id6HFg/free_slot_machine_games_free_spins_no_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jekidase/3FlHHZd/rap_gumball_vs_gravity_falls.pdfIn PDF document text
    • http://lamakexo.scienceontheweb.net/sopunoviketafalez.pdfIn PDF document text
    • https://cdn.sqhk.co/donuvoduvedo/fmehaj8/hello_dolly_songs_in_wall-_e.pdfIn PDF document text
    • https://cdn.sqhk.co/zapimafe/eja9jeK/jifiwapabinedifejaderu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422914/normal_6036d6312e34f.pdfIn PDF document text
    • https://cdn.sqhk.co/linewebozid/sV5ygip/hexa_1010_block_puzzle_game_record.pdfIn PDF document text
    • http://tifusavegapawuf.mygamesonline.org/timex_dual_alarm_clock_radio_t439s_manual.pdfIn PDF document text
    • http://nasufulorejuwe.mywebcommunity.org/75036571056.pdfIn PDF document text
    • https://cdn.sqhk.co/netimupoxojo/jeiiFgj/68400598107.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mijewuwusos.epizy.com/ragnarok_m_eternal_love_crusader_leveling_guide.pdfIn PDF document text
    • http://xupasafagimi.rf.gd/leave_application_template_for_school.pdfIn PDF document text
    • http://jejotatimub.rf.gd/asme_y14._5._1m-_1994.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_off0000dc4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4C 5468 bytes
SHA-256: 27e697c103a489b2838f45394d11ae990014662ec9c2e0baed9bc91485f3ce0a
font_01_sfnt_off0000eefd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFD 11028 bytes
SHA-256: d958dc97e1ebc77a0591abb2f1249583f469da684cdfec9df652ca7a3fe557f9

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