Malicious PDF — malware analysis report

Static analysis result for SHA-256 f81ac6e942d109ba…

MALICIOUS

PDF

74.1 KB Created: 2021-03-06 23:53:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: e60b1b01c09a93f386102c23d9761b74 SHA-1: cdf3034df27791615c5e19c84bccb6f22a9da2b0 SHA-256: f81ac6e942d109baca1578bdf43ee2596efc9606cb347289bf2e2747a0c3cff6
126 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, indicating a phishing or trojan payload. It contains numerous embedded URLs, with the primary one being `https://fokemale.ru/strik?utm_term=who+do+i+call+to+repair+my+oven`. The document body, though heavily obfuscated, suggests a lure related to appliance repair, which is a common tactic for phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fokemale.ru/strik?utm_term=who+do+i+call+to+repair+my+oven PDF link annotation
    • http://poradoit1.site/one_touch_ultra_reset_memory5yzm5.pdfIn PDF document text
    • http://findattime.com/able_free_condolence_card_template00rcp.pdfIn PDF document text
    • http://matawobedopikam.mywebcommunity.org/65695148355.pdfIn PDF document text
    • https://cdn.sqhk.co/jonimaze/kicXGhi/day_trading_strategy_philippines.pdfIn PDF document text
    • http://jolixasij.sportsontheweb.net/30171558332.pdfIn PDF document text
    • http://ligugiban.scienceontheweb.net/19602203546.pdfIn PDF document text
    • http://kdghy.online/excel_calendar_template_week_starting_mondayz5n5j.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/xcjh1ia/lirik_lagu_mimpi_k_clique_mp3.pdfIn PDF document text
    • https://cdn.sqhk.co/parapirer/iidiiot/42066970054.pdfIn PDF document text
    • http://snapchat-alert.com/peliculas_gratis_para_adultosracum.pdfIn PDF document text
    • https://cdn.sqhk.co/jorisuzil/ghiiige/mawemojafarapuviputato.pdfIn PDF document text
    • http://naturalm.space/660268083884nb87.pdfIn PDF document text
    • http://alphabitx.com/nys_driver_license_mailing_statuszhytb.pdfIn PDF document text
    • http://bellissimo.online/genie_garage_door_opener_installation_manualuvxwd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_b4c9d2b7a9c540fe990d6d10173bbd1c.pdf?index=trueIn PDF document text
    • http://naxesabefadufu.atwebpages.com/battery_tender_junior_800ma.pdfIn PDF document text
    • http://wugujub.onlinewebshop.net/why_has_my_fan_stopped_spinning.pdfIn PDF document text
    • http://juwukopegonamu.onlinewebshop.net/visualizing_nutrition_everyday_choices_3rd_edition_ebook.pdfIn PDF document text
    • https://c46c713f-5e69-4c64-aad4-d86f29440f76.filesusr.com/ugd/957c7b_c3be6a9171d7480a8b64774db5a6e2ec.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB16 2900 bytes
SHA-256: a28fcc4ba65d8171a55e8b87d646ac5d1dd213f66ab2b0026fd39e5ca5d32d1a
font_01_sfnt_off0000e558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE558 5312 bytes
SHA-256: 531a93b2b7bc44b36930f3b1ad0d4c60418e373e09f92e9fe1b0746750d75c20
font_02_sfnt_off0000f74f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74F 10468 bytes
SHA-256: 16fee24af80303879ce20963c981e7e0b3d7dc531180015ec4ac0878f7d41493

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