Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b92b4e96946c0bc…

MALICIOUS

PDF

77.0 KB Created: 2021-03-10 06:05:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5c771cd6f71830f8736e2c375bb8311d SHA-1: dfb453a483aa7f46c0cd282d6ba71ff6958aaa4e SHA-256: 1b92b4e96946c0bc2e764a01173ec2168ed5f49f49acce491c0007d376660dfc
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or SEO manipulation scheme. While no scripts were explicitly extracted, the PDF structure and link farm behavior suggest it's designed to redirect users to potentially malicious or phishing content hosted on these external URLs.

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/123?utm_term=beneficial+insects+in+agriculture+pdf PDF link annotation
    • https://pifonexivusefeg.weebly.com/uploads/1/3/1/0/131070190/4d8a0c0a37341d8.pdfIn PDF document text
    • https://vawenajibafadak.weebly.com/uploads/1/3/1/3/131384306/tawikagor_zepefuzozuja_vaxodivig.pdfIn PDF document text
    • https://niwurepezexeted.weebly.com/uploads/1/3/5/3/135312419/fea15fe35.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412900/normal_6006a243c3eaf.pdfIn PDF document text
    • http://vowufijetapiko.sportsontheweb.net/how_to_sign_up_for_salvation_army_christmas_assistance.pdfIn PDF document text
    • https://dijujuvosidig.weebly.com/uploads/1/3/0/8/130873718/jupobixo-zebaw.pdfIn PDF document text
    • https://rafutukeri.weebly.com/uploads/1/3/1/4/131453201/fufujibetixa_ligib_tenavone_dugor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490754/normal_5fd9e4a237d8a.pdfIn PDF document text
    • https://tuxipowu.weebly.com/uploads/1/3/4/6/134699968/balax_tamadujitubag.pdfIn PDF document text
    • https://wixurawitubeza.weebly.com/uploads/1/3/4/3/134319602/xubamov-rijoxegazozu.pdfIn PDF document text
    • http://majusenise.sportsontheweb.net/bisevepakozumugad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385417/normal_5ff3b598ece54.pdfIn PDF document text
    • https://xifuvago.weebly.com/uploads/1/3/0/8/130813557/geravejilusuler-bimabowe-faweziwobutoro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/523ff15a-b0c9-4701-b875-c6b473ebdb58/la_catedral_del_mar_2_stagione.pdfIn PDF document text
    • http://vedixemalirugi.atwebpages.com/72211355667.pdfIn PDF document text
    • http://keguwaburafokul.epizy.com/invisalign_case_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8100c744-f740-49d0-9c9d-32409d8debf6/39251094465.pdfIn PDF document text
    • http://duvodix.myartsonline.com/can_you_take_the_written_driving_test_online_in_mississippi.pdfIn PDF document text
    • http://bulodagobudika.epizy.com/fisher__paykel_dishdrawer_user_guide.pdfIn PDF document text
    • http://bitujiduruv.myartsonline.com/melomewizetexe.pdfIn PDF document text
    • http://jovelinejovadu.epizy.com/foxoner.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7E 5372 bytes
SHA-256: 049b099da483aae2bc9d11852f85a129399308ca75ccd11b2a57363c608a5fba
font_01_sfnt_off0000fed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED5 11916 bytes
SHA-256: 52df2efb959c59923a181d8bc5ffe44f565eb7ada62e3ec026b048e63ce6c044