Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dffcaa5b7849caa…

MALICIOUS

PDF

70.6 KB Created: 2021-02-28 18:46:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 89fa04e25b5ea6e5678f717d2573d692 SHA-1: 9f118decd60d866a03a595c9fd16eeed9ec1d67f SHA-256: 3dffcaa5b7849caa01cd8e7019c4cfe7a26f7a88d880dcdd1aa3c9c2a3f755c2
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains text related to 'streaming' and a URL that appears to be a lure for users to visit a potentially malicious website. The presence of external URIs and the link farm heuristic suggest the document is designed to redirect users to external, untrusted 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://bologen.ru/wix?keyword=les+vacances+du+petit+nicolas+streaming PDF link annotation
    • http://voztrans.ru/83870465608upbze.pdfIn PDF document text
    • https://luxabilep.weebly.com/uploads/1/3/0/8/130873941/muxusoxulozarope.pdfIn PDF document text
    • http://xagidodovinudu.iblogger.org/how_to_do_a_3_point_perspective_drawing.pdfIn PDF document text
    • http://timurberg.ru/ranupugofuzumrhxs.pdfIn PDF document text
    • https://zinuwikisabarek.weebly.com/uploads/1/3/4/6/134679236/rizinufanegevir_mozimejefopu_sorokumo.pdfIn PDF document text
    • https://vovavurag.weebly.com/uploads/1/3/0/7/130739927/5dd62.pdfIn PDF document text
    • https://jozevupipe.weebly.com/uploads/1/3/5/3/135346753/pulepo.pdfIn PDF document text
    • http://zoosalon.org/oraciones_cortas_sujeto_verbo_y_predicadoqj4v6.pdfIn PDF document text
    • http://eslife.pro/anti_terrorism_shooter_hack_gameah9yu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://karelovaluz.epizy.com/formal_letter_to_congressman_sample.pdfIn PDF document text
    • http://zepurudevivo.rf.gd/classify_quadrilaterals_lesson_32_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/belegigoz.pdfIn PDF document text
    • http://dorowoz.rf.gd/27622072954.pdfIn PDF document text
    • http://xuxirifuv.rf.gd/42114965814.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/64603771001.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_off0000d410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD410 5396 bytes
SHA-256: 02418a253275ebd6f399f1953c6ef5324ef8eaf42615ff215f12f10c39cd21a8
font_01_sfnt_off0000e65c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65C 11664 bytes
SHA-256: 94003291c0ad0dce3df973790ec7d36b039490f23a57521f15d5bc6d325929ed

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