Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dea4104e19bed14…

MALICIOUS

PDF

68.0 KB Created: 2021-09-27 01:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b38bcb8d653ddcf0acc7efb5824d2b52 SHA-1: 2fce21ec94d8c6ed3aeba2b2a6b3d832e52be529 SHA-256: 6dea4104e19bed14ca08bdbbcae228e3bb9a5104eba4ea8f180d48e7ea64eb25
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. Heuristics indicate it functions as a link farm on disposable hosting, with numerous embedded URLs pointing to potentially malicious content. Although no scripts were explicitly extracted, the PDF structure and the nature of the embedded URLs suggest an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://shopabrang.com/images/files/vikuniwekibokopanirololoz.pdf In PDF document text
    • http://robvancampen.nl/userfiles/file/wipatito.pdfIn PDF document text
    • http://kdsonline.org/userfiles/file/76314168579.pdfIn PDF document text
    • https://www.pension-chevaux-haras-gabereau.fr/ckfinder/userfiles/files/47780215093.pdfIn PDF document text
    • https://tims.ro/ckfinder/userfiles/files/xisufe.pdfIn PDF document text
    • http://design-klasse.de/ckfinder/userfiles/files/wogipolosa.pdfIn PDF document text
    • http://ambvet-trefontane.eu/userfiles/files/takekelug.pdfIn PDF document text
    • http://paoladebenedetti.eu/userfiles/files/refukatadin.pdfIn PDF document text
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/47546556785.pdfIn PDF document text
    • http://thangmayedex.com/webroot/img/files/83652916060.pdfIn PDF document text
    • http://hzqljsj.com/images/upload/File/77440949937.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/e7a2447a6c3f5f3f382d9fbe0fc88a15/62429915902.pdfIn PDF document text
    • https://zerling.eu/nico/images/files/refijukazisafeso.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/pukuzuzevaluxarunogetebir.pdfIn PDF document text
    • http://studiogallerani.it/userfiles/files/subefa.pdfIn PDF document text
    • https://securitydm.com/slicice/file/93408458775.pdfIn PDF document text
    • http://parfumland.sk/upl/25889668222.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/41187884046.pdfIn PDF document text
    • http://gadkowski.pl/repository/filemanager/file/70218588819.pdfIn PDF document text
    • http://k-sta.kr/FileData/ckfinder/files/20210901_EC2B32E853F36AEB.pdfIn PDF document text
    • https://markapin.com/calisma2/files/uploads/dukawujegidojejiv.pdfIn PDF document text
    • http://fajni3333.fun4two.pl/uploads/assets/file/xevabubojutow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=best+android+story+gamesPDF 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_off0000ad2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD2D 14864 bytes
SHA-256: 47b880d4b6f4f7c287b8df29c26ee77263f51188693c4b78d56919a4cd31b402
font_01_sfnt_off0000d287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD287 10712 bytes
SHA-256: 09ef8c4fbd17e0a3d1b963861e8079cd8deed826058496e7de12e86a614dcb67
font_02_sfnt_off0000eafb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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