Malicious PDF — malware analysis report

Static analysis result for SHA-256 47f31b98ca0db39e…

MALICIOUS

PDF

87.3 KB Created: 2021-04-11 12:15:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: ebe229cdd90ff5e8e5a2c47c243c0964 SHA-1: 23573b33924ed1c832140ca9a392a0ef6d837fc1 SHA-256: 47f31b98ca0db39e7bbaab961d49c4f0db1be7b78d2cbc50579e32b3f24445cc
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous external URIs that likely lead to phishing sites or malware downloads. The heuristic PDF_SEO_LINK_FARM indicates a mass of external links, suggesting a coordinated effort to redirect users to potentially harmful content.

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 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.
  • 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://seumenha.ru/strik?utm_term=how+to+hire+a+graphic+design+intern PDF link annotation
    • https://fofagova.weebly.com/uploads/1/3/4/3/134313529/poveba.pdfIn PDF document text
    • https://cdn.sqhk.co/wemonamo/aZfnhcg/wefepenefupowapona.pdfIn PDF document text
    • https://toripifisesu.weebly.com/uploads/1/3/4/3/134367164/6891348.pdfIn PDF document text
    • https://cdn.sqhk.co/bolomadu/zldjagi/block_breaker_game_free_download_for_android.pdfIn PDF document text
    • http://mijipuva.iblogger.org/exception_handling_in_c_notes.pdfIn PDF document text
    • https://cdn.sqhk.co/pesamelez/jHHmC9q/bloodsport_2_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/bokirebi/hcgeugj/c_c_generals_rise_of_the_reds_cheat.pdfIn PDF document text
    • https://cdn.sqhk.co/tamurikubol/fihYhjo/povopare.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479223/normal_601080fe0eea3.pdfIn PDF document text
    • https://pilolekolaf.weebly.com/uploads/1/3/4/6/134655903/39f2f956c24b5.pdfIn PDF document text
    • https://cdn.sqhk.co/fabetojowuje/fjeNAEl/master_super_emulsion_price_in_pakistan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420775/normal_5fd2e08c4a65d.pdfIn PDF document text
    • http://masevetito.22web.org/34649432382.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kititone.epizy.com/69644294823.pdfIn PDF document text
    • https://0f939073-77d1-4307-aaa8-42539c8515e3.filesusr.com/ugd/85c9df_fb402cb0e92647899f41b1fc636a0dab.pdf?index=trueIn PDF document text
    • http://xijibajuno.rf.gd/oeuvre_bel_ami.pdfIn PDF document text
    • http://jovesupegomiz.epizy.com/prevent_form_submit_if_field_empty_jquery.pdfIn PDF document text
    • https://8dfd47f4-e591-4377-92a3-bdbf91d41e5a.filesusr.com/ugd/a58b01_e3a7f9c4a7124f84aff1f509b31ad2eb.pdf?index=trueIn PDF document text
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_2ad79c4f969a434890e6b19898cc6a47.pdf?index=trueIn PDF document text
    • https://dda5c79a-a75d-44d9-a006-48dec3bfe172.filesusr.com/ugd/115d6e_6bc81eec058b4040b8f288deb3b821e3.pdf?index=trueIn PDF document text
    • https://c7f0abc7-d23b-482d-bd16-0771495bb668.filesusr.com/ugd/bb13a2_fdee14564b1f4f58adede50708d30ed6.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_off0001190e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190E 5356 bytes
SHA-256: 77e667c7e8430f37277e47e069bf00f94a893d0c21779e4dc1c5c9ab9e2f0a08
font_01_sfnt_off00012b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B4D 10828 bytes
SHA-256: 9be1183c0fc1700f45c430e4e9aefdd9704a7124f7c2dc5e38ccf205e5f37bee