Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ee50b3140f37c5b…

MALICIOUS

PDF

79.4 KB Created: 2021-03-15 23:14:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b61afe4ff688b737957fc1f5af7ef10c SHA-1: 231ced2bb42bedae281483175e816d277bed0139 SHA-256: 1ee50b3140f37c5b7876aa5abfa10fe4d5566ad2fece3edff04672a787dbf765
206 Risk Score

Malware Insights

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

The PDF contains numerous embedded links pointing to disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to external sites for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://pelibifir.ru/strik?utm_term=kyocera+fs-1135mfp+troubleshooting PDF link annotation
    • http://kefijor.mygamesonline.org/26239893615.pdfIn PDF document text
    • http://nitesufi.sportsontheweb.net/55245938345.pdfIn PDF document text
    • https://cdn.sqhk.co/jojevirelo/jdFCggj/fishstick_from_fortnite_battle_royale.pdfIn PDF document text
    • http://fovoxarofej.getenjoyment.net/67660393593.pdfIn PDF document text
    • https://cdn.sqhk.co/wexunaveb/fjBgfgh/74001381395.pdfIn PDF document text
    • https://cdn.sqhk.co/fapetemiji/RlicihG/livugipo.pdfIn PDF document text
    • https://tobubetabopu.weebly.com/uploads/1/3/4/0/134095895/339d386d08172d.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/pidetidiropalekulinun.pdfIn PDF document text
    • https://cdn.sqhk.co/vonirosidejo/idhflib/zombicide_black_plague_rules.pdfIn PDF document text
    • https://gakosokilexavum.weebly.com/uploads/1/3/2/6/132695298/nikixovoj.pdfIn PDF document text
    • http://zedakobogesa.mypressonline.com/software_assurance_maturity_model.pdfIn PDF document text
    • https://cdn.sqhk.co/dapubebireba/dgjgcf2/download_game_clan_race_mod_apk.pdfIn PDF document text
    • http://godotobekof.scienceontheweb.net/authorized_honda_lawn_mower_repair_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/segenoliz/ltjBocj/ace_high_movie.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/kirby_vacuum_repair_memphis_tn.pdfIn PDF document text
    • https://cdn.sqhk.co/gukugifixija/IhfWK5s/girl_chat_up_lines.pdfIn PDF document text
    • https://gamajebijapam.weebly.com/uploads/1/3/1/8/131856653/xovuzagurabez_gezuzonufoboti_xoxagazuruvi_fevinikalego.pdfIn PDF document text
    • https://duvozeja.weebly.com/uploads/1/3/0/7/130739152/majabokonimuj.pdfIn PDF document text
    • http://zosuwalerikare.getenjoyment.net/kuvebimonuneb.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/b59ec574-b14d-41df-9110-3f2be538faaa/how_difficult_is_mulesoft_certification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ceb0b3c-f1d2-454d-8f01-a1a8a79fcebc/81821904861.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a2ea35e-9b56-47e6-b8f5-f83d8d9e7b23/directed_reading_section_energy_flow_in_ecosystems_answer_key.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD205 3724 bytes
SHA-256: b64350c7bbdab9a8dc064f21a0594747627629593141b2bb6cd02da97e11ebda
font_01_sfnt_off0000df43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF43 5892 bytes
SHA-256: 3c8df558c58af5cfba7c54dd4d266690acf297e48952a5c8c542449473a0e427
font_02_sfnt_off0000f33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33C 14120 bytes
SHA-256: 5879db1e441fb936af418560121239083e10082c23d00e37593cda700ffed96b
font_03_sfnt_off00011f3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

Open this report in the interactive analyzer, or submit your own file for analysis.