Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e02c5804a69c30d…

MALICIOUS

PDF

70.4 KB Created: 2021-09-11 20:28:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a1c1d4962978b29530532af4e545c485 SHA-1: 946e0b8457016c1a29a6b2cbe4eb926898a20c8e SHA-256: 3e02c5804a69c30da6ba0a356e129f16f707e8051b465102e5130056716797cc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a high number of embedded URLs, many pointing to disposable or unknown hosts, indicating a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a tactic for distributing malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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 http://cgl.lu/userfiles/files/44819064671.pdf In PDF document text
    • http://eubeer.vn/uploads/files/dilabolezoxokivaz.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/4d014802c01809301025566c68ff0f26/jikajo.pdfIn PDF document text
    • http://matraholding.hu/images/userfiles/files/92268371504.pdfIn PDF document text
    • http://modero.vn/upload/files/61807326956.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/68827419250.pdfIn PDF document text
    • http://www.horakgolf.cz/ckfinder/userfiles/files/gemeromonuvaxavatiguke.pdfIn PDF document text
    • https://pima-alarms.eu/slicice/file/84081142988.pdfIn PDF document text
    • http://redemaisfarma.com/userfiles/file/bulixexamokarare.pdfIn PDF document text
    • http://morecoredesign.com/images/imageUps/files/kaguxiripegibuvi.pdfIn PDF document text
    • http://yidaig.com/uploadfile/file/20210905190539.pdfIn PDF document text
    • http://kvbm.org/pds/userfiles/files/7823638906.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/falexasawekewofazap.pdfIn PDF document text
    • https://e-midas.ro/files/file/rudibodedezidilisutawadi.pdfIn PDF document text
    • http://versobrokers.eu/userfiles/files/59620801280.pdfIn PDF document text
    • http://peoplefoster.com/pliki/68923554298.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613b255b06497---nawiwipuxulapewati.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/xejixelif.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/48113702975.pdfIn PDF document text
    • http://www.sindafaz.com.br/admin/editor/ckfinder/userfiles/files/684050123.pdfIn PDF document text
    • https://penal-garazh.ru/files/tikevewageto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=raspberry+pi+3+android+tv+2020PDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2DE 15372 bytes
SHA-256: a66d2985efcd3ee26cc78f4855d60923efa0c98be71c96975a8da77f2a82fe1b
font_01_sfnt_off0000d9d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f1e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E7 11116 bytes
SHA-256: 84e0b6dbdd2fcd7680c39d85845f0e201544d125115a1018219cd8c4fc914b9d

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