Malicious PDF — malware analysis report

Static analysis result for SHA-256 021bc97425a2dfdc…

MALICIOUS

PDF

69.0 KB Created: 2021-02-15 00:48:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 434f3e3026d52178d77e43c38c6ffe44 SHA-1: bc9e1f8927997bf86034dbe2de6d1365d7cfcd94 SHA-256: 021bc97425a2dfdcfd3e4e51e1cc581ac5b61f553433bfd1f30f660e4e49c5ef
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs pointing to disposable hosting and link farms, a common tactic for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://seumenha.ru/123?utm_term=bite+of+83+and+bite+of+87 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4499636/normal_5feff6dfead76.pdfIn PDF document text
    • http://it50save.info/neuroplasticity_psychologyoqye1.pdfIn PDF document text
    • https://lojapajarete.weebly.com/uploads/1/3/4/5/134521209/4fb89.pdfIn PDF document text
    • https://nuwomanat.weebly.com/uploads/1/3/4/6/134664603/sadukojugefagu_sitolaras_wilujovi_palad.pdfIn PDF document text
    • http://mkr-olimp.info/red_hot_chili_peppers_pretty_little_dittyypygv.pdfIn PDF document text
    • https://jarosebat.weebly.com/uploads/1/3/4/6/134695718/votekipo.pdfIn PDF document text
    • http://teaapple.space/67906219001578ap.pdfIn PDF document text
    • https://cdn.sqhk.co/sozedikepasu/hcQjd2M/dilawawepikuwisusiripudij.pdfIn PDF document text
    • http://casbah2point0.com/xalufiwiwuzibadamow9w08h.pdfIn PDF document text
    • https://vezutokabev.weebly.com/uploads/1/3/4/7/134758566/torimuzap-lasejese-gamolafanefu-judozijomojekax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/91287167310.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_off0000d2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DB 5220 bytes
SHA-256: 96da05cbe66f39c423b5d38ae847ef623215f2d7b2f7bdad67903b8cc804f81f
font_01_sfnt_off0000e4bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BC 10276 bytes
SHA-256: 84de41cf89db18000eef8563d2df269aac3e890b12a64eeec88b68321c8d953b

Open this report in the interactive analyzer, or submit your own file for analysis.