Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c4b06e59883702d…

MALICIOUS

PDF

75.3 KB Created: 2021-06-14 06:05:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c610eb68d459d2c34585561b1777645a SHA-1: 5230dd464b83d61a2f4c411eee7735a40a164e33 SHA-256: 6c4b06e59883702d0ee699eb0687bd852c03b13fa49fa02ed32a948a5422d7d1
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs likely lead to malicious websites designed to trick users into revealing sensitive information or downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://infrive.ru/pbw?utm_term=how+do+i+get+more+stardust PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459630/normal_605fb43c818a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403429/normal_601e4239124d0.pdfIn PDF document text
    • https://sadozilodefizon.weebly.com/uploads/1/3/4/6/134659806/wunewojav_bixegonoki.pdfIn PDF document text
    • https://rugepokowefi.weebly.com/uploads/1/3/5/2/135294276/lurufofade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477156/normal_606610cb1c5c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402503/normal_60580353407a2.pdfIn PDF document text
    • https://definifizuzum.weebly.com/uploads/1/3/4/7/134759181/duruxifep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459916/normal_602a0ab7a7250.pdfIn PDF document text
    • https://tonapakosu.weebly.com/uploads/1/3/7/5/137511677/f438603.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416786/normal_5fcae4c233cb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475995/normal_60c3dd6c67b85.pdfIn PDF document text
    • https://gokejaxax.weebly.com/uploads/1/3/6/0/136056436/3659534.pdfIn PDF document text
    • https://raxorevowipafe.weebly.com/uploads/1/3/4/7/134765671/xolakazenosagug-ledivab.pdfIn PDF document text
    • https://zaderurumanig.weebly.com/uploads/1/3/4/5/134588260/fanutekodim.pdfIn PDF document text
    • https://zipuboxovasabe.weebly.com/uploads/1/3/1/4/131483293/a2519026e33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386091/normal_605622f72764a.pdfIn PDF document text
    • https://kevosenebiv.weebly.com/uploads/1/3/1/8/131871602/xutapef-zireturawebem-davabuvi.pdfIn PDF document text
    • https://felixitu.weebly.com/uploads/1/3/4/0/134012625/8b89a5.pdfIn PDF document text
    • https://pedasivu.weebly.com/uploads/1/3/5/3/135387907/721293.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD902 4168 bytes
SHA-256: ba1575f4f455a5735514561a5728598d9088a5ed15095052d30215ce1873fe2d
font_01_sfnt_off0000e7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CC 5164 bytes
SHA-256: e2eb13ee435f0ed3b6cc77f0363d438125b2851c45d17efd33a58857b10dce6d
font_02_sfnt_off0000f955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF955 10748 bytes
SHA-256: 866531dfab2b0341284d33268b52f3de2305e05f73bf9fc3f708314a23c0ab73