Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e396024d4a96403…

MALICIOUS

PDF

77.7 KB Created: 2021-01-22 06:39:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 9ee60ede5d64d81ad24d33ef0f927768 SHA-1: f0e79d3c6b6ce1b9e315be90c1fd784c9cb3b3a1 SHA-256: 2e396024d4a96403a3ebf09e913b73cd5459409e13db4f778fb5213a99ea88c6
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics indicate it functions as a link farm, with numerous external URIs pointing to disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious sites.

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://trafffe.ru/123?utm_term=el+poder+del+autoestima+nathaniel+branden PDF link annotation
    • https://zumugewij.weebly.com/uploads/1/3/1/4/131483128/1036160.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/cRhjlic/tidejopo.pdfIn PDF document text
    • https://puxipevabama.weebly.com/uploads/1/3/4/3/134308905/xarodal.pdfIn PDF document text
    • https://cdn.sqhk.co/niserutom/Oggjb7M/international_superstar_soccer_deluxe_genesis_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/zudoputasafe/jaCsidp/68677629329.pdfIn PDF document text
    • http://zobebukore.22web.org/bfgminer_5._3._0.pdfIn PDF document text
    • http://rafewasugajeze.22web.org/menu_costing_template_uk.pdfIn PDF document text
    • https://lolinukopo.weebly.com/uploads/1/3/4/3/134351434/libobez.pdfIn PDF document text
    • http://wubegewefek.iblogger.org/thank_you_very_much_in_italian_formal.pdfIn PDF document text
    • http://romigeguwapefi.22web.org/johnson_acoustic_and_auditory_phonetics.pdfIn PDF document text
    • https://pifujikis.weebly.com/uploads/1/3/4/8/134875168/fifeniger.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vugapadilubokis.epizy.com/gdex_annual_report_2019.pdfIn PDF document text
    • http://lesodabat.epizy.com/48526561422.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/chloroform_contamination_well_water.pdfIn PDF document text
    • http://fabupumow.epizy.com/answer_complaint_document_speaks_for_itself.pdfIn PDF document text
    • http://fotopokidag.epizy.com/rocky_2008_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/batman_arkham_origins_mod_apk_latest_version.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B4 5180 bytes
SHA-256: 695f976355170c3fd4d587f15095254c8c9a5f55fa11cd9ba8af355feea30474
font_01_sfnt_off0000f70f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70F 11060 bytes
SHA-256: 137d664f25d8e2db0e88e5db42d65678ad3144564482c760253f39bdbe832a44
font_02_sfnt_off00011af7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF7 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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