Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c0d1c4d47bbf37e…

MALICIOUS

PDF

72.4 KB Created: 2021-09-17 08:00:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 24c60df297cfa5c53009b3a93025600a SHA-1: 0b4064ed6de2677211099c5a1e084c1b3fe15a98 SHA-256: 2c0d1c4d47bbf37ec54e951538e99c20a464c9acb33ed366a5450ea1efcb7904
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. The presence of 'utm_term' parameters in some URLs further supports a tracking or redirection mechanism for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://oniceh.ru/uplcv?utm_term=among+us+apk+full+unlocked PDF link annotation
    • http://zhongjiukeji.com/upload_fck/file/2021-9-12/20210912204420418120.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/runawilonanebixojap.pdfIn PDF document text
    • https://e-room.co/userfiles/file/55600859556.pdfIn PDF document text
    • http://vicc.huh.hu/UserFiles/File/dajerasotitunu.pdfIn PDF document text
    • http://tavio.su/files/file/7432290548.pdfIn PDF document text
    • http://napiarsaigh.com/images/80779870440.pdfIn PDF document text
    • http://vantaidongsaigon.com/uploads/files/57701309504.pdfIn PDF document text
    • http://pietroquatriniarchitetto.eu/userfiles/files/ratokazeweve.pdfIn PDF document text
    • https://mygoaltv.com/ipp/images/uploads/files/96744833653.pdfIn PDF document text
    • http://netart.hu/userfiles/file/gadef.pdfIn PDF document text
    • https://limsurempat.com/contents/files/vujesojozowibubovo.pdfIn PDF document text
    • http://dungcumaymoc.com/Images_upload/files/wibusim.pdfIn PDF document text
    • https://mimpishio2bet.net/contents/files/zedamodejabadegexotilun.pdfIn PDF document text
    • http://avatars.ru/userfiles/file/gutexixufodu.pdfIn PDF document text
    • https://mintedimages.com/ckfinder/userfiles/files/27764936729.pdfIn PDF document text
    • https://ever-progress.com/upload/files/busurewumiwosa.pdfIn PDF document text
    • http://chiengthai.com/file_media/file_image/file/dojemopijafo.pdfIn PDF document text
    • http://refah4ter.info/basefile/hotelrefah4terir/files/60575712796.pdfIn PDF document text
    • http://syntrend.critical.tw/upload/files/paboginewafakezuveg.pdfIn PDF document text
    • http://trufeel.com/ckeditor/ckfinder/uploadfile/files/16422676631.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/161379f3ccfc5d---fibigexikixalan.pdfIn PDF document text
    • https://ksuskalology.com/images/file/nuzexabevapoko.pdfIn PDF document text
    • https://whitesal.com/data/images/file/1985_20210914112036.pdfIn PDF document text
    • https://makiriaszto.hu/ckfinder/userfiles/files/zimin.pdfIn PDF document text
    • https://ccs-corporation.com/ckfinder/userfiles/files/xelafekunajuka.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://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_off0000b904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB904 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD116 16316 bytes
SHA-256: ebe57096b2b91c4dd26c073796cfd3db20a88656ef19ba4949413412ef8d098d
font_02_sfnt_off0000facd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACD 10844 bytes
SHA-256: 4925b83a87f8b5ddd9748b49bf4a38a369a58531fbf7b8a41d6419126c588ef8

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