Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9d0d7d89c7867c1…

MALICIOUS

PDF

85.8 KB Created: 2021-04-21 08:07:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 18ae8090b295434d5d470a007f726f39 SHA-1: 52de05622ddfb8ebcd2d34f2ff61a26c559b3857 SHA-256: d9d0d7d89c7867c166ac1a6ce050e91c84e63679beecfa16e535775deda20e0b
186 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model with high confidence. It contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or SEO manipulation tactic. The embedded URLs suggest a phishing or malware distribution attempt, likely leveraging the numerous external links to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://bologen.ru/strik?utm_term=msi+z97+pc+mate+manual PDF link annotation
    • https://nugobobunebiset.weebly.com/uploads/1/3/5/3/135303429/9489536.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366034/normal_5fefc91d0cdaa.pdfIn PDF document text
    • https://xexidizufom.weebly.com/uploads/1/3/4/5/134508107/meboniz.pdfIn PDF document text
    • https://gekaketiba.weebly.com/uploads/1/3/1/4/131455198/foduxebun-favipatave-wemalifobamaw.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/2hhDjcp/is_my_2nd_degree_burn_infected.pdfIn PDF document text
    • https://latobebesat.weebly.com/uploads/1/3/5/9/135993630/4697537.pdfIn PDF document text
    • https://wodikaludesavoz.weebly.com/uploads/1/3/1/4/131453455/4964773.pdfIn PDF document text
    • https://cdn.sqhk.co/zowipitilo/jTggidp/lenovo_yoga_730-_13ikb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454550/normal_6019d8a2959d5.pdfIn PDF document text
    • https://powizosiki.weebly.com/uploads/1/3/4/0/134041047/8535476.pdfIn PDF document text
    • http://texewofe.22web.org/48315950624.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_6062ea26ee3c9.pdfIn PDF document text
    • https://dawirusopu.weebly.com/uploads/1/3/2/3/132303146/3e48f068.pdfIn PDF document text
    • https://cdn.sqhk.co/bavozazav/gcDjhgh/nesusofamejufi.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://s3.amazonaws.com/gafedupeba/wajedotilunedonusinakuj.pdfIn PDF document text
    • http://tamikukezinubi.rf.gd/blended_learning_uncovering_its_transformative_potential_in_higher_education.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/dell_optiplex_7010_mini_tower_dimensions.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/fudakarog.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/maai_teri_chunariya_song_320kbps.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/balancing_equations_worksheet_grade_10.pdfIn PDF document text
    • http://poposepoj.rf.gd/epson_artisan_1430_inkjet_printer_for_heat_transfers.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_off0000ff1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1B 5044 bytes
SHA-256: 7e455195b277152605aa94fd7eca1cf763f444eaab282103994d327edd591b99
font_01_sfnt_off00011032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11032 12556 bytes
SHA-256: 2a0216e77777cac2434d8204691f46f58155b087ccaf3611103251e0b1c1de7b
font_02_sfnt_off00013a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A8F 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378