Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8c2c0e56e9be4ff…

MALICIOUS

PDF

86.4 KB Created: 2021-04-08 02:22:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 5709ff0f3fcff5d9c5c8dbb1a5e1beb1 SHA-1: 932a1db560e0c42722a85abb2d8af9dfa4509ae1 SHA-256: c8c2c0e56e9be4ffe6c0c2405bb955874c733ec777fbce7dd8491376d0c41336
264 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to disposable domains and redirector infrastructure, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the PDF structure and embedded URLs are indicative of a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://dafemum.ru/strik?utm_term=how+to+use+mophie+powerstation+8000 In PDF document text
    • http://shortsomfj.space/how_to_program_dish_remote_to_samsung_tv_without_codes2kd7p.pdfIn PDF document text
    • http://nituzovido.getenjoyment.net/kuzajew.pdfIn PDF document text
    • http://teplotronic.ru/daisy_powerline_model_1200_co2_bb_pistol_partskaz4y.pdfIn PDF document text
    • https://cdn.sqhk.co/zijigemeworu/jb3Xk4k/auto_clicker_automatic_tap_true_developers_studio_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/zatovafer/bthc3zy/unicorn_photo_frame_template.pdfIn PDF document text
    • https://cdn.sqhk.co/risejesob/Phbigjj/sage_the_gemini_best_songs.pdfIn PDF document text
    • http://waxedeb.getenjoyment.net/44745992996.pdfIn PDF document text
    • https://fofirajajamide.weebly.com/uploads/1/3/4/6/134643930/siboxuxu-zijexawa-jipon-pupobalen.pdfIn PDF document text
    • http://tifusavegapawuf.mygamesonline.org/delonghi_tch6590er_ceramic_tower_heater_manual.pdfIn PDF document text
    • https://rudunusom.weebly.com/uploads/1/3/4/6/134602981/navakawutilala-rikukij.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/Iohcy4l/ways_to_sharpen_a_knife_without_a_sharpener.pdfIn PDF document text
    • https://cdn.sqhk.co/zujubiviv/nlTiehj/electrical_interlocking_wiring_diagram.pdfIn PDF document text
    • http://leon-stavki.info/iceman_inheritance_amazon5govo.pdfIn PDF document text
    • https://cdn.sqhk.co/tekixonef/feghigd/nomezibe.pdfIn PDF document text
    • http://sidufapas.mywebcommunity.org/helicobacter_pylori_tratamiento_nutricional.pdfIn PDF document text
    • https://damupose.weebly.com/uploads/1/3/1/0/131070457/gevuxasegebagodagini.pdfIn PDF document text
    • http://setafugeridol.scienceontheweb.net/aapc_medical_coding_training_book.pdfIn PDF document text
    • https://vataripisak.weebly.com/uploads/1/3/4/6/134600115/37bba1.pdfIn PDF document text
    • https://cdn.sqhk.co/tosuwukiwate/uii15Jl/zokunajifula.pdfIn PDF document text
    • http://giwewigipebi.medianewsonline.com/moworebosiga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://najijojovigom.myartsonline.com/benim_hocam_abt_tarih_soru_bankas.pdfIn PDF document text
    • http://lofunadex.myartsonline.com/98773251977.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2A 5416 bytes
SHA-256: a4ca769980e4e5095838a2d7dfe5d03b6086d0e11de67e2aa053e763cc4544d9
font_01_sfnt_off00011072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11072 11280 bytes
SHA-256: 79ffbed4c7e842c30eb0631fcb70d06ac8a9df555d4e0c00012e837c54f4630b
font_02_sfnt_off000136fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136FB 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848