Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd1459c001321c6a…

MALICIOUS

PDF

70.7 KB Created: 2021-06-30 19:42:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3d60c47d66d8fcbc8d63bd581f64a379 SHA-1: 73665feaea8f5a1a14437b1747a17557ab718644 SHA-256: bd1459c001321c6a925faa8eb4786e0a7757cf238d738e4150a35734bd18f202
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised CMS upload directories, suggesting it functions as a link farm to distribute further malicious content. The document body is heavily obfuscated and unreadable, providing no direct user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d63a33b739---vimibijiwozepufumekedija.pdf
    • https://dagvandearchitectuur.be/_files/file/kinemuroxevovuwoxumozutaf.pdf
    • http://aclamerica.com/customers/CMS-IMAGES/file/31247799134.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/vhbatv2eho4ip2phbbjjl3jvd1/69413501205.pdf
    • https://nepalipublisher.com/ckfinder/userfiles/files/62151341224.pdf
    • https://rewaqousha.net/userfiles/files/senudizaxuwe.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e1da75519---8058833278.pdf
    • https://immobilgold.com/file/40717677550.pdf
    • http://elfuklid.cz/foto/Image/file/soxizetujuviximo.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/aa87e4272e851098b0617eebd14dcc6c/gofavuxiwivalipojaw.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/bc8a81cj76qrkbe0knubaaoh14/raxumetexuz.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a43fadaa1c0---5953769028.pdf
    • https://baxsporthorses.com/userfiles/file/lidukivojiridogivim.pdf
    • https://sunarchegypt.com/userfiles/file/53268635340.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/rp3t1earftttc1564dqtjebkfj/82428943984.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8a6ed4e908---47710676484.pdf
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/ne1fctgaosi3gs2bsb028ja72g/bajigunotibuxesirofusiru.pdf
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/87212daed810c7abc3a937bde8315ce1/15662767171.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/d523035856600a42cc505f3cc49441f1/68758932326.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6031d1a2b---48782474291.pdf
    • http://anatolianlgs.com/userfiles/file/sofezimeziwedizetojefajan.pdf
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/1aa5a3c24b46403ef4c1419e3f1a9488/zidefogelidiselanikoxefap.pdf
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf58508aade---87260399941.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/1ba3240868e4dd2ddcc0463d666fa2d6/damupi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=will+smith+song+switch
    • 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_off0000b6e0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB6E0 16792 bytes
font_01_sfnt_off0000cef7.bin
87118fbce8e55a7bb2c85d0733756c7174ba1ba467ee0548ba8813fdc97caecd
pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF7 10364 bytes
font_02_sfnt_off0000e633.bin
87972385658a31f1a5ba687a1c0c673d996417c34f00f5c9bcd4539bc2c88fba
pdf-font-stream PDF embedded font (sfnt) at offset 0xE633 15420 bytes