Malicious PDF — malware analysis report

Static analysis result for SHA-256 f29f9c509c0eebc9…

MALICIOUS

PDF

81.9 KB Created: 2021-09-17 06:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7d591c0d63a6bcdc98c38ea934984bd7 SHA-1: aba3f601b71022ebb7d4c0bac1c2cbc555e60740 SHA-256: f29f9c509c0eebc976886a7926bc482bf2e33f4c388da09c54b22fe41e3b4a50
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, one of which is associated with a potential phishing lure. The PDF structure and embedded URIs suggest it is intended to redirect users to malicious websites, possibly for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://infrive.ru/uplcv?utm_term=sopranos+season+1+123movies PDF link annotation
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1614406b6ced2f---82813441935.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/sedugaz.pdfIn PDF document text
    • http://systemsbiology.at/uploads/assets/file/jinoruremuwakuvinak.pdfIn PDF document text
    • http://lnv-cnc.com/userfiles/file/79547003291.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/xevivubojudedatorero.pdfIn PDF document text
    • http://ohmamakitchen.com/uploads/files/dubusazawamedob.pdfIn PDF document text
    • http://kamnitikamini.si/upload/files/vatuzepevatetatowulofigu.pdfIn PDF document text
    • https://banderlogclub.ru/Files/file/95078688464.pdfIn PDF document text
    • http://hwayinn.com/image/files/20210901_083546.pdfIn PDF document text
    • http://akifkasaboglu.com/esatfisek/images_upload/files/dadasi.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/59c68c058bf635c92066e1263b6b65d0/dirijegis.pdfIn PDF document text
    • https://kaktutzhit.by/uploads/files/zumopezuluzali.pdfIn PDF document text
    • https://riminabda.sk/userfiles/file/kagav.pdfIn PDF document text
    • https://fetogram.com/images/upload/files/78982446512.pdfIn PDF document text
    • https://pcetravel.com/files/file/rimigeburuboridabotugom.pdfIn PDF document text
    • https://garraldaarquitectura.com/garralda_userfiles/files/dolisulupofokoto.pdfIn PDF document text
    • http://mariondhuique-mayer.com/data/file/40291848701.pdfIn PDF document text
    • https://tessuno.com/upload/files/613a3e1204461.pdfIn PDF document text
    • http://obras.ru/sites/default/files/uploads/33589820599.pdfIn PDF document text
    • https://wineart.online/userfiles/file/wewuvesu.pdfIn PDF document text
    • http://mobilenmr.com/files/files/wapigibelez.pdfIn PDF document text
    • http://stickers-moins-cher.com/userfiles/stickers-moins-cher.com/file/21569037167.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_off0000dd2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2C 10756 bytes
SHA-256: e8fa6bb7a37b275412d16b00853f7175284efba27fce6506b74d1464aba96d6c
font_01_sfnt_off0000f5f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E08 16996 bytes
SHA-256: a00a0898ccabfcda187c89a6a8764ce4265e6740da26ee4e83565a8b62f1b4c1

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