Malicious PDF — malware analysis report

Static analysis result for SHA-256 e023f9ed19cbf2a5…

MALICIOUS

PDF

72.3 KB Created: 2021-09-25 15:55:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 97ca9b1d141e8d4590b44eb8b117829e SHA-1: 0bbb4c25dd356991559b9768e96ee8530631d279 SHA-256: e023f9ed19cbf2a565acff255f690e92c16b15fcf3e39c3ade7c4be5ed019e52
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it contains a link farm on disposable hosting, with numerous links pointing to distinct hosts, and a specific URL containing 'cheats to get money in gta 5 online' in its query parameters. Although no executable scripts were extracted, the structure and URL patterns suggest an attempt to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://formpart.com/upload/ckfinder/files/tazabetojanudinafol.pdf
    • https://ikansambel.com/contents/files/15981868569.pdf
    • http://radiopoint.cz/userfiles/file/tevatalasarogomi.pdf
    • https://mtmnetwork.net/uploadEditor/files/65478785376.pdf
    • http://goodlack.cz/userfiles/file/19089495406.pdf
    • https://butagallery.com/userfiles/files/26669985620.pdf
    • https://gtselect.fr/ckfinder/userfiles/files/ligenajasilegizago.pdf
    • http://homeopathyhongkong.cn/files/31583638105.pdf
    • http://tznjl.com/userfiles/files/pexivudejopulewufupisevu.pdf
    • https://alkirbilaw.com/userfiles/files/zasilolajeki.pdf
    • http://uniquehotelsolutions.com/files/others/71415210863.pdf
    • https://alzubidi.com/userfiles/files/vidosimizetoxotimaju.pdf
    • https://abhimaninteriors.com/ckfinder/userfiles/files/88818793174.pdf
    • http://allamericannursing.com/userfiles/file/21376418688.pdf
    • http://dycelife.com/userfiles/file/zopoxurulevabikolad.pdf
    • http://neurooperations.com/ckfinder/userfiles/files/pavubimexadamekadodawuwol.pdf
    • https://hotelreviewreserve.com/basefile/hotelreviewreservecom/files/4771915071.pdf
    • http://bjerkelunden.org/content/files/userfiles/file///lozepuvebalelirosexi.pdf
    • http://china-shengbang.com/upload_fck/file/2021-9-22/20210922174827374420.pdf
    • http://styrexon.cz/userfiles/file/witumolijutogiwa.pdf
    • http://perchegouet.com/ckfinder/userfiles/files/zurubowaduxes.pdf
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/88ddd61f07239d8fd39916e97ecb9c9f/45355060577.pdf
    • http://danguykhoidoanhnghiephp.vn/Upload/files/30454191926.pdf
    • http://emilybarnes.com/DEVELOPMENT/VERSIONED/emilybarnes/trunk/sites/default/files/file/fovanomudalivitupe.pdf
    • http://eurogeographyjournal.eu/admin/fckfiles/file/36564364546.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=cheats+to+get+money+in+gta+5+online
    • 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_off0000b556.bin
a6720bc6b20c086f4dc69c3756ee1f6cb0cd18e4787c1a93909acef818c49943		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB556 10736 bytes
font_01_sfnt_off0000cded.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDED 16792 bytes
font_02_sfnt_off0000e5ff.bin
1b384cc519014f3516dadc01f864402b51349e7a6466037c2c5c61b593bb1e87		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FF 17832 bytes

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