Malicious PDF — malware analysis report

Static analysis result for SHA-256 74c2f574c3cc705d…

MALICIOUS

PDF

69.5 KB Created: 2021-09-25 11:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 14b5be29d88f94af5b787ec35a970513 SHA-1: dc7fc0cc02a83ea471c8470454ee0e3bb37b25d2 SHA-256: 74c2f574c3cc705d128954867208328328f229bf4e7fced09cbe6d34651e685f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious. It contains a large number of embedded URLs pointing to various domains, suggesting a phishing or malware distribution campaign. The document's structure and the presence of numerous external links indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://chcial.ru/uplcv?utm_term=office+365+16+product+key
    • https://valkexclusief.reviewz.eu/app/webroot/files/userfiles/files/mevuzufifirokumog.pdf
    • http://caratow.nl/userfiles/file/wemul.pdf
    • https://gamma-electronics-eg.com/userfiles/files/6403014873.pdf
    • https://icon-studios.com/userfiles/file/1805599784.pdf
    • https://gs-hemeringen.de/ablage/userfiles/files/sosojazuwifigasar.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131f7a8b01c6---10058129442.pdf
    • https://bdaudit.ro/userfiles/file/41942584289.pdf
    • http://shijijiaming.cn/filespath/files/20210920082316.pdf
    • http://liebherr-tr.com/userfiles/file/30150712705.pdf
    • http://slbreakingnews.com/ckfinder/userfiles/files/geravuruzijawowareg.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1612f46759295b---xegajizulevorulomomubabez.pdf
    • http://dr-temt.ru/images/file/79275981459.pdf
    • http://www.ssc-ras.ru/ckfinder/userfiles/files/kikagisug.pdf
    • https://marwaservicecenter.com/nbloom/fckuploads/file/jenisinexufuzofamex.pdf
    • http://24cvety.ru/upload/files/firatidilulemoxoz.pdf
    • https://f2h63c2.ip4secure.net/upload/files/kakazuxilogebuje.pdf
    • http://emaaravm.net/upload/files/95953388519.pdf
    • https://proartgaleria.hu/files/files/81242506274.pdf
    • http://cameralehiep.com/hinhanh_fckeditor/file/58514971184.pdf
    • http://mirai-kankyo.com/userfiles/files/fititigozonu.pdf
    • https://excellencetogether.com/img/files/file/88323901150.pdf
    • http://diegogenna.it/userfiles/files/petitawowebafurutuditamex.pdf
    • http://thsport.dk/ckfinder/userfiles/files/guburad.pdf
    • https://perkunasstudio.com/uploads/files/202109090306329780.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b264.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB264 16792 bytes
font_01_sfnt_off0000ca7b.bin
9987168791c6784d5998c5d3ee61b6ec2b365190a9d9d1a3daee2dba1d05e97a
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA7B 10988 bytes
font_02_sfnt_off0000e44a.bin
34366960ee50d2a03fa3d87e71927fb94e4d32b9f603ba213edc9da330a91ed2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE44A 14436 bytes