Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4d18265f101503c…

MALICIOUS

PDF

75.8 KB Created: 2021-05-02 13:57:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0239ffb1339654e115a14b2f13d6f24a SHA-1: 586609fefc5a24813ee2cf401b4a37e79d322be4 SHA-256: f4d18265f101503c0e3611c6fb8d84d9e8f3503c8d9f80d17c0db58d618e02ae
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a notable redirector at 'https://druttle.ru/strik?utm_term=dark+souls+remastered+ps4+sale' and a disposable hosting link 'http://tuwasukam.getenjoyment.net/febowu.pdf'. The document body, though heavily obfuscated, appears to reference a video game sale, suggesting a social engineering lure.

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://druttle.ru/strik?utm_term=dark+souls+remastered+ps4+sale PDF link annotation
    • http://tuwasukam.getenjoyment.net/febowu.pdfIn PDF document text
    • https://vakenufepuxino.weebly.com/uploads/1/3/4/5/134529081/kozusegev.pdfIn PDF document text
    • https://dotowukigirer.weebly.com/uploads/1/3/1/1/131163902/5306446.pdfIn PDF document text
    • https://dujizajep.weebly.com/uploads/1/3/4/7/134704211/bafar-murimojekojo-laxivurod-fimivofosej.pdfIn PDF document text
    • https://sexedevojaboto.weebly.com/uploads/1/3/2/6/132695366/7943348.pdfIn PDF document text
    • https://wivujugojuz.weebly.com/uploads/1/3/4/8/134883460/c586f5ad.pdfIn PDF document text
    • https://zipobirin.weebly.com/uploads/1/3/5/3/135386694/jopadivebesa_totefa_jenaxoto_bewaxeguvu.pdfIn PDF document text
    • http://kovamuwaropepu.getenjoyment.net/nisevom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7deb256e-ebd6-412e-91dd-5b4cd027da33/jibulu.pdfIn PDF document text
    • http://xigufogadenake.epizy.com/discussion_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a64ce3f1-0ff3-4dfc-9428-f7559acd0ef2/64973904599.pdfIn PDF document text
    • http://butozijiko.epizy.com/biosynthetic_pathway_of_amino_acids.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/trumpet_voluntary_organ.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71e34b22-9ef5-4212-a936-51101f0897e3/5040753104.pdfIn PDF document text
    • http://noluduji.epizy.com/64982590527.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_off0000e919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE919 5256 bytes
SHA-256: 132ec8836b68a93b773a107be390ee26a0645c2eb2d7158dc2da260847a07e3c
font_01_sfnt_off0000faf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF0 11480 bytes
SHA-256: 7df16e28195ddba55b8c93f75aa42a22d96a7864e0ba16de23a9ab13441c2344

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