Malicious PDF — malware analysis report

Static analysis result for SHA-256 b715a762bb5a1091…

MALICIOUS

PDF

99.1 KB Created: 2021-04-30 02:01:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: f8d0c84fe482bda7a2b2ea9d26444fd6 SHA-1: 6c86284fbe18fa4356fe4b9b35d9bf8c9a9d5948 SHA-256: b715a762bb5a10918cd5bd5f0b674cf9fb6b73739c0d618df122c60dca9b9bd7
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm. The presence of 'utm_term' in the URL suggests a tracking or redirection mechanism, common in phishing or malware distribution campaigns. Although no scripts were explicitly extracted, the PDF structure and embedded URIs indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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
  • 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://druttle.ru/strik?utm_term=ncaa+football+14+division+2+teams PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489733/normal_60388cfae37b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413701/normal_6042c731958f7.pdfIn PDF document text
    • http://bestpriceforukraine.xyz/48167361488er2v1.pdfIn PDF document text
    • http://cooldomen.space/80728584483e55z5.pdfIn PDF document text
    • https://cdn.sqhk.co/kefekawit/jbxwXBm/amaze_file_manager_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393362/normal_601a49cc911bc.pdfIn PDF document text
    • https://cdn.sqhk.co/tusujoxaseru/giUhfRe/89061579416.pdfIn PDF document text
    • https://cdn.sqhk.co/sidamebo/iamjbJx/82666832854.pdfIn PDF document text
    • https://cdn.sqhk.co/retugatodof/dUiihe2/12282256760.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379046/normal_5ff1f14d7a383.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453142/normal_5fe7bcf6889cf.pdfIn PDF document text
    • https://cdn.sqhk.co/lokutibu/iihENeS/11676314503.pdfIn PDF document text
    • https://cdn.sqhk.co/gowozepugax/Xhew4hj/art_masters_programs_california.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxujagemo/fkibKAs/kannada_film_feeling_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/iihe5ia/tefejotonamasiliwegiwo.pdfIn PDF document text
    • https://cdn.sqhk.co/gokovolasula/fghTihQ/general_online_game_download_apk.pdfIn PDF document text
    • http://wide-take.top/gawimurerunolopubaji2sfec.pdfIn PDF document text
    • https://cdn.sqhk.co/rilixuzewiv/dLvjgPD/36494832988.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/37579594-4b8d-41a7-bcbf-407bad049bc2/mazikosasizajunegebosivef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/703e0d09-fac3-41f0-a67c-bf52b828edbf/68875836632.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa8a94af-a992-4c4f-9f2c-6c21dde2b8b7/6184177378.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5efbc793-c396-4883-9206-6be935f3cb60/39124155714.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bb2dbee-d2e8-4fa0-b136-5bc8ac373d96/how_to_reset_sentry_safe_x075.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dee772d0-e3c8-4ef3-8d6a-c9c0037df85c/samsung_c480fw_reset_transfer_belt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60b73f04-afb0-4a2b-9b34-90aa41b387f1/does_walmart_do_canvas_prints.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/943f5831-e9ec-457a-88d1-8435d4707cc0/guitar_songbook_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c5dab3c-eb3a-4499-bd33-acee21c66d89/45961863383.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000134ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134ED 5300 bytes
SHA-256: c95aee0925f433f2d079cfde74557e6e2fe46e76ab860c1e16a0d1b652a812bb
font_01_sfnt_off000146ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146EC 12356 bytes
SHA-256: f4f58a99ed456548fde2432df39fd5be7b477bdc335ff9cab2a5d90a3db1dc4f
font_02_sfnt_off00017047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17047 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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