Malicious PDF — malware analysis report

Static analysis result for SHA-256 3abca321471be49e…

MALICIOUS

PDF

87.8 KB Created: 2021-06-28 20:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 23bd05c31cf4e34836c3915f22dd37c7 SHA-1: 00b0f2cfa80b113f7984352f731ded78885f46ef SHA-256: 3abca321471be49ed94e7e8becfa70a8afed8312d4c000397b4569e83c6eeba8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers, indicating malicious intent. It contains numerous links, many hosted on compromised WordPress sites, forming a link farm likely designed to redirect users to malicious or phishing content. The presence of these links suggests an attempt to lure users to external resources, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609052e9459c5---87946107696.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/a8b155f5cfad370909a33aea1ef5a775/vuriwujukilamadukumewaliz.pdf
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/ce749b38264a70274ce45c112e6357fb/44669723041.pdf
    • https://feniks9.ru/ckfinder/userfiles/files/8968204329.pdf
    • http://meble-tk.pl/userfiles/file/30135056436.pdf
    • https://aydin-elektrik.com/resimler/files/7967131478.pdf
    • http://stewartreunion2020.com/clients/2/2a/2a0d9dcdd57715375c9f4393c24df0f2/File/begegavi.pdf
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/koh1kunrjocg2lkomcfdsaprc5/20866742176.pdf
    • https://powermailer.in/userfiles/file/pepolagasifafutemu.pdf
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/vq9jn4p31gtho1aunj364b9cf8/68909083193.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e504ca3672---39655037095.pdf
    • https://menu2uplus.com/images/file/bexif.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff1b331181---kafuxujozu.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b73838bd82c---jikapi.pdf
    • http://goteneplast.se/files/images/file/55697460543.pdf
    • https://ski-experience-japan.com/images/blog//file/29416157148.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e3a6f1fd7---7717721496.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c888912c29---71307878026.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c48bbcebf30---gubexaserukazegaralanel.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0739786751---woxuberufefotebidixuworo.pdf
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7eddd88b87---13513655860.pdf
    • https://villatoscana-pi.it/userfiles/file/75536336394.pdf
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084372d75758---66504875812.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=flights+from+phl+to+athens+greece
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ded6.bin
0491ab1f9781984131449868ed95f15036bddabad70a51597ae233fa8bdf08d0
pdf-font-stream PDF embedded font (sfnt) at offset 0xDED6 16076 bytes
font_01_sfnt_off0000f3fd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FD 16792 bytes
font_02_sfnt_off00010c14.bin
5c46014c7c5d4ab80f7fcbdd149cf43285454136775239c17b2c9bffefa36e61
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C14 10904 bytes
font_03_sfnt_off0001251a.bin
86edbcec97e3199248eefd4cfe4e506e4958d6a286fb8b7d2212e316b95ecbd5
pdf-font-stream PDF embedded font (sfnt) at offset 0x1251A 16980 bytes