Malicious PDF — malware analysis report

Static analysis result for SHA-256 2da9815e10be461b…

MALICIOUS

PDF

79.3 KB Created: 2021-04-15 02:29:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: dede758672e263cd7a568404724d8a6c SHA-1: 2985447af755ea1441ec7862488e53e95757db08 SHA-256: 2da9815e10be461bf0c86a8f547b8d5db0f8cee010a2a24629f667347cfafeb7
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, including ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to potentially harmful websites.

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://pelibifir.ru/strik?utm_term=how+to+light+ge+xl44+oven PDF link annotation
    • https://gukofatupov.weebly.com/uploads/1/3/1/0/131070505/tafogifap.pdfIn PDF document text
    • http://torchland.xyz/free_christening_certificate_templatesfr4q1.pdfIn PDF document text
    • http://dutov.org/begosevokeborevojozimoqtifz.pdfIn PDF document text
    • http://lafuvenilimagi.iblogger.org/75564050672.pdfIn PDF document text
    • https://pumejikugo.weebly.com/uploads/1/3/0/9/130969330/f99b7694b135fa5.pdfIn PDF document text
    • https://zoguripan.weebly.com/uploads/1/3/1/0/131070442/wabesaw-fizure.pdfIn PDF document text
    • http://xujadawowupu.scienceontheweb.net/88188797555.pdfIn PDF document text
    • http://xofenejilomoz.iblogger.org/13578414216.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/82288816715.pdfIn PDF document text
    • https://vefutafefu.weebly.com/uploads/1/3/4/8/134882527/af0f151d2d44.pdfIn PDF document text
    • https://tixovokibena.weebly.com/uploads/1/3/4/1/134109053/xegepedipudib.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://6db1e9a2-4282-4636-8d41-de07325ad911.filesusr.com/ugd/d97b38_913d59088f9141b2901a40d300d0b7ce.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/667ec1d7-1784-49e6-b39a-b8075984c523/zuwinikerirexusuv.pdfIn PDF document text
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_2ce13a3611f44e92ad6c5b63bbbb57b6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5320c203-f6db-48aa-8dec-33e82ab88686/yamaha_rx_v677_review.pdfIn PDF document text
    • http://lidiremuvuzanas.rf.gd/dulopejutan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70dc8618-5bef-4385-bff4-3a856f136977/arris_tg862_admin_login.pdfIn PDF document text
    • http://vabagez.rf.gd/83950121151.pdfIn PDF document text
    • https://ddb281da-11d2-423e-b83a-408ecf1f607f.filesusr.com/ugd/9db61c_8840504838974abdb3ac5c2f91d84cac.pdf?index=trueIn PDF document text
    • https://1d942ef5-affb-47d8-8f99-70a3d187b733.filesusr.com/ugd/3283b0_831652a1a03a47b7ac793d19eac8bd1e.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DF 4520 bytes
SHA-256: 997a946f78a709aa50c1c63e6f9bf6d17894630076ec76010dc7ac930455da06
font_01_sfnt_off0000f249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF249 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off0000fad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD7 10920 bytes
SHA-256: cf585ed80a9be12cd211a5c29c6b02b7a2dca8a1b9cb2d3553057adebc7d65a3
font_03_sfnt_off0001201c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1201C 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361