Malicious PDF — malware analysis report

Static analysis result for SHA-256 4476e58e8bf9b589…

MALICIOUS

PDF

80.7 KB Created: 2021-02-23 08:08:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d1bffcae5486796da65386f2a0cdef88 SHA-1: 49dec27a85dd14a17cf3b375fc3c611be02f4c82 SHA-256: 4476e58e8bf9b58936c3a39f09cd94a42220759e3822af860a84f2307399eba8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, with at least one pointing to a suspicious domain ('bologen.ru') and another to a PDF file ('plusstore.pro'). The presence of these links suggests the document is designed to redirect users to potentially harmful sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/strik?utm_term=the+shack+around+me PDF link annotation
    • http://plusstore.pro/502831892043v1jg.pdfIn PDF document text
    • http://winoorama.website/how_to_calibrate_a_braun_thermoscanu816r.pdfIn PDF document text
    • http://websecurer.tech/jonathan_livingston_seagull_music_free_download8pmkm.pdfIn PDF document text
    • http://circulyarkadigital.xyz/70048965407jne5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450152/normal_5ff48e6468bd5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369333/normal_60028c49564ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385228/normal_5fcf45dda2efc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xakarejosav.epizy.com/pazojaxebatifapam.pdfIn PDF document text
    • http://zoregok.rf.gd/coreldraw_2017_free_trial.pdfIn PDF document text
    • http://wixudilasajigil.rf.gd/55436552439.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/93997366509.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/90206197818.pdfIn PDF document text
    • http://tinurewewe.rf.gd/96619469441.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/catering_management_books_free.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDE 5160 bytes
SHA-256: 72b7576da35f3d95c1b79c70eb56cffb256f80148d19237391dafa96583427bd
font_01_sfnt_off00010e41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E41 12432 bytes
SHA-256: 1691411153a982512f68f74bfceb647282a41c3f47c80433157de0c321c8b9e9

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