Malicious PDF — malware analysis report

Static analysis result for SHA-256 72d227e6c47c95a3…

MALICIOUS

PDF

65.3 KB Created: 2020-12-17 15:01:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 183a4b3453d0f2000fecc6e82c0fb362 SHA-1: 13d3cd1b05595d7b2be368432273040f4b9eb73b SHA-256: 72d227e6c47c95a3beb7d0cf90351a6279a49775d6b9a593ef7aaed50e4917d8
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document body, though heavily obfuscated, contains text suggesting it's part of a link farm designed to redirect users to various external websites, including one that appears to be a search result for music sites. The presence of numerous external URLs, many hosted on disposable domains, further supports a phishing or malicious redirection scheme.

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://traffnew.ru/wb?keyword=best%20sites%20for%20music%20s PDF link annotation
    • https://sudiseva.weebly.com/uploads/1/3/4/4/134470115/likizasilapuru-wodomipumawuw-vozeg.pdfIn PDF document text
    • https://kedasawavofari.weebly.com/uploads/1/3/4/5/134589708/bateda.pdfIn PDF document text
    • https://puvujoda.weebly.com/uploads/1/3/4/3/134326666/mipozufu-vinofejulola.pdfIn PDF document text
    • https://tadinitalu.weebly.com/uploads/1/3/4/7/134744808/dateloxidew_kanadowapelejuw.pdfIn PDF document text
    • https://kelodulelonax.weebly.com/uploads/1/3/4/6/134644310/genokiz.pdfIn PDF document text
    • https://vipukawolatu.weebly.com/uploads/1/3/4/4/134486161/5930892.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0e1448ef7301f8b1097bc/t/5fc1fcc361e25426e17e6169/1606548675903/93203370909.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5756a6609fd0ee7b04842/t/5fcf4de70496d067bdd01a6b/1607421416417/baseball_9_cheats_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/18104453927.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc067539955c744b5390d02/t/5fcc02e8920f47545b7f4a2d/1607205609662/xefidowajezatupuso.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4dfad403f5353fdaf152a/t/5fc92e1910afe20ba6412017/1607020057590/big_12_basketball_championship_game_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/mp4_movies_pc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc529855e8e827d42a99b3c/t/5fcff380ad967b4c603e32c9/1607463808173/dibelotezunifaz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54a99f7cf8c754047cbac/t/5fd06f3e12264b5dfdcc5eb8/1607495486910/nalasipupasatul.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_off0000c570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC570 4832 bytes
SHA-256: e83d84ebc919448d5a011b6fc47b59ec56eeba41f308eed95b16240f80a3dd22
font_01_sfnt_off0000d5d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D1 10296 bytes
SHA-256: 14f87bb44267734655148345d2d6a55addd2f3ac6b27485e71cc72f4d3cccf9e

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