Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed36f4ef16892399…

MALICIOUS

PDF

67.4 KB Created: 2021-03-07 20:00:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9bc1aa785af0a01a3625d838ba001f00 SHA-1: ae912ad414254b2756c01f3aff8c3026e69c410f SHA-256: ed36f4ef1689239951bb141f55d00286a37b8374e02cdd430e0bcf01175852e6
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs that lead to suspicious domains, including one that appears to be a link farm designed for SEO manipulation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although 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 0.9998

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://gimoguvi.ru/award?keyword=how+to+eat+fried+worms+full+movie+fmovies PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4472186/normal_6032dba67dd8f.pdfIn PDF document text
    • http://robugipunebib.mygamesonline.org/85315089842.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470540/normal_602c57d9f23bb.pdfIn PDF document text
    • https://cdn.sqhk.co/juvowisire/gheighg/school_management_software_open_source.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424630/normal_5ff323e1d02b4.pdfIn PDF document text
    • https://cdn.sqhk.co/kitijorawul/dbowqig/revheadz_engine_sounds_mod_apk_1._24.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452374/normal_5fe0609b60b93.pdfIn PDF document text
    • http://vibolofisef.mywebcommunity.org/98048583769.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446782/normal_5fce73545888b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453105/normal_5ff28542e02d7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ed0f7819-48b4-4c0d-9119-93de03d81b9c.filesusr.com/ugd/e481ce_3596e862d1d44276940d94394d94f9b1.pdf?index=trueIn PDF document text
    • https://ab737b70-891a-4a1f-8db9-ee548211cb31.filesusr.com/ugd/ce14f3_a775203e489a46428f8ace01ff42d4d0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xozeb/garden_furniture_cad_blocks_free.pdfIn PDF document text
    • https://5a4e7950-e122-4b3c-9cf7-894e7f5b1216.filesusr.com/ugd/76aeb6_dfd9a48b3db64edda1b1ffb58b4a5e1f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rebomedug/xutaxawupevusime.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/slide_ppt_islami.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_off0000ccfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCFA 5164 bytes
SHA-256: bdf95c93586de9a87f75477c2c7fa7966c0bffb4ac3fb7100ebc70f6bcf64b30
font_01_sfnt_off0000de8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8E 10016 bytes
SHA-256: 325d417ab272e2473f693fe1226691a749e568d2ab94453d3850e59b9ca0d1b7

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