Malicious PDF — malware analysis report

Static analysis result for SHA-256 c994dda386d09a5e…

MALICIOUS

PDF

76.2 KB Created: 2021-03-04 06:06:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6301c2d9e379748b5dd1db59b12d9fb3 SHA-1: 245669c0a8b28d4dc013fa3e99253d11c233b888 SHA-256: c994dda386d09a5e4a489d98a4b23772583dd57c2bf9dc5461addaa06b757fc3
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on disposable domains, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, contains text related to search terms, reinforcing the phishing 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://nipisod.ru/wix?keyword=annuario+pontificio+2016+english+pdf PDF link annotation
    • https://cdn.sqhk.co/zewezerezi/jeVheia/voxufujale.pdfIn PDF document text
    • https://zanirifut.weebly.com/uploads/1/3/1/4/131407922/1121693.pdfIn PDF document text
    • http://mivejuvididu.66ghz.com/64541659013.pdfIn PDF document text
    • http://buzosidatiwe.iblogger.org/zufifibizozezovi.pdfIn PDF document text
    • http://vorgazme.com/footlocker_marketplace_mall_rochester_nyk787j.pdfIn PDF document text
    • https://refanoripusegu.weebly.com/uploads/1/3/4/3/134306014/topegabidulofabetip.pdfIn PDF document text
    • http://bapozuwemixad.22web.org/96816417932.pdfIn PDF document text
    • https://newovedisi.weebly.com/uploads/1/3/5/3/135348170/naxetow_sididusasidi_zuzem_surukase.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mobotifiriw.epizy.com/68085357636.pdfIn PDF document text
    • http://vizijikiwoler.rf.gd/9162260066.pdfIn PDF document text
    • http://valamujunitun.epizy.com/fekaxokadewopirotum.pdfIn PDF document text
    • http://suvubojetixag.epizy.com/73618487909.pdfIn PDF document text
    • http://xijovapafibowuw.rf.gd/nojitopolowewakipidaxu.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_off0000e2f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F1 5888 bytes
SHA-256: 1e0c09b7e236c58d0bac704daa94730438967953e63e3444b182bf9c0fe0fe79
font_01_sfnt_off0000f6fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FE 13400 bytes
SHA-256: e6206434ec408c5868c658a4a536c6f6944debfcb21f1ea9c3f7d46ed82bc38b

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