Malicious PDF — malware analysis report

Static analysis result for SHA-256 3585216cf6c8dea6…

MALICIOUS

PDF

86.8 KB Created: 2021-04-03 08:49:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 66cd49fb063035d3fed42ac0d1100dc3 SHA-1: 1156d74edf7398a1d0c263eacb1b99e94b4ec0aa SHA-256: 3585216cf6c8dea632cdfa7f48b3c022be1a234428e047d486cebb86df740b8e
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://maypoin.ru/123?utm_term=greenlee+bender+guide PDF link annotation
    • https://naxizugopigonav.weebly.com/uploads/1/3/1/4/131408516/jolipasepumo-kitifamivetexa-bigijotu-dajuben.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/aLhiXPc/weather_app_icon_anime.pdfIn PDF document text
    • https://janusizexagelu.weebly.com/uploads/1/3/5/3/135337128/5c119c5f9f.pdfIn PDF document text
    • http://wejaduz.mypressonline.com/87795396088.pdfIn PDF document text
    • https://wewodagib.weebly.com/uploads/1/3/4/2/134266566/9625b690e44.pdfIn PDF document text
    • https://suzagosezamonu.weebly.com/uploads/1/3/4/4/134446802/e12375f.pdfIn PDF document text
    • https://cdn.sqhk.co/fusevesapime/icNCSOZ/the_family_chantel_cast_instagram.pdfIn PDF document text
    • https://vojidejera.weebly.com/uploads/1/3/2/6/132695434/d3d06fb39a6c6d.pdfIn PDF document text
    • https://cdn.sqhk.co/xozirijor/jn41if0/fire_and_brimstone_definition_literary_term.pdfIn PDF document text
    • https://jufasoxoko.weebly.com/uploads/1/3/5/3/135315704/nitunipa.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/jcgduEZ/farurobi.pdfIn PDF document text
    • https://pinukavuzufov.weebly.com/uploads/1/3/4/3/134307945/lagogabusin_wegux.pdfIn PDF document text
    • https://kafolegilu.weebly.com/uploads/1/3/2/3/132303068/2b677.pdfIn PDF document text
    • https://jalamipitifem.weebly.com/uploads/1/3/0/7/130738892/topoxuripogeniju.pdfIn PDF document text
    • https://zuwiliwiwira.weebly.com/uploads/1/3/1/0/131071082/b217b03a700.pdfIn PDF document text
    • https://lujuvikib.weebly.com/uploads/1/3/1/4/131406806/fojaduribufeguma.pdfIn PDF document text
    • https://sudejewakigalo.weebly.com/uploads/1/3/4/0/134040490/vifaduzujide.pdfIn PDF document text
    • https://kufudazasa.weebly.com/uploads/1/3/4/6/134626120/2449668.pdfIn PDF document text
    • http://moxawunanenubop.sportsontheweb.net/80107740330.pdfIn PDF document text
    • https://rekeboko.weebly.com/uploads/1/3/4/8/134899800/a9bd46ff19299.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d6ac5066-27fc-4e71-a07d-b30af50dfe8b.filesusr.com/ugd/934fc3_c05ac52df0f44ceab089204b4e1ab265.pdf?index=trueIn PDF document text
    • https://329f26c8-0235-4118-8622-173d264d9cf1.filesusr.com/ugd/221f3a_99b9000a898f477f95e2213ffb6c245a.pdf?index=trueIn PDF document text
    • https://04fc2a56-3ca8-4b90-bfe8-b05f9e7ed3d8.filesusr.com/ugd/51e9d0_5ac05398b5a1425ca075bdfae3dcf85f.pdf?index=trueIn PDF document text
    • http://zakefuki.myartsonline.com/basaniwoxu.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_off0001119a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1119A 4776 bytes
SHA-256: 95a4d78bfb2f07ff588b5e8ca37a5a9fb9998c042f85020f2532031b496ffff5
font_01_sfnt_off000121e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E7 13876 bytes
SHA-256: ea3ebb3a56af9d10ae89f6abe41b2f33b915b66ae0dc275070a9721f03e02759