Malicious PDF — malware analysis report

Static analysis result for SHA-256 1499b05e7112ecf5…

MALICIOUS

PDF

85.1 KB Created: 2021-06-29 18:45:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b3bdaf51e5032b7280844ce3f6645ad7 SHA-1: a56eda8246ff859d15f200e585f434b44b7fa9a4 SHA-256: 1499b05e7112ecf59f6d07461a8933d754004bd8c515a2bb77dbaf312b4c2b30
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, further obscuring its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/a25027b14d3fdf0af3511ec24270b68d/jekotuwes.pdf
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/2qsk4b373fin1gtv1fjs8ii1mm/zubasaxesikunominigix.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070bf2a771ef---32761566729.pdf
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/8om74p8ndap86b1fsrb84khnsk/71000134329.pdf
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/l7d1lpj5gqkd5r5bfcjum01k1e/69503373532.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085c278aef1c---xasof.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160893cf9bb2cd---12376766064.pdf
    • https://delaneyllc.com/ckfinder/userfiles/files/5078483409.pdf
    • http://provia-events.de/pics/fotos/1/file/dipufipomowufuzed.pdf
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/io1stfvhandev7o27d93jdlku1/33247484867.pdf
    • http://md-servicios.com/userfiles/file/nuwod.pdf
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/895845da5911cfe8e86183300cd0158e/74622947795.pdf
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/a19f4e8e82a706220b21c7d923c04c0e/71588558873.pdf
    • https://zegabilisim.com/calisma2/files/uploads/dowaladesu.pdf
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/cdefc7cbdcd02bd3965b119fb88b382b/tarozururoxeduwawizi.pdf
    • http://epoxidice.ro/mm/file/40032029698.pdf
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/7a2a9e7cad50e83e057b081744d7dc03/33185454728.pdf
    • http://brandnewgoods.net/userfiles/file/kagibiduletezisasafuma.pdf
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/votuxalegip.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1607935fd7b494---20155303184.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcbb51ee8b4---32816024438.pdf
    • http://spl-designs.com/ckfinder/userfiles/files/lusuzupenoberor.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a47aeeb3ef2---popuvir.pdf
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c69a414b43e---87843138716.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=sim+6+not+provisioned
    • 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_off0000e8f5.bin
f026a512251a2b24410a959e361b15881d269aef8138d0490ce1754ae801df77		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F5 17032 bytes
font_01_sfnt_off0001157a.bin
34b12ba838bddab8e1a088f31f00ae2420120a9337c3a8003d9d9a148ca5c55b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1157A 10652 bytes
font_02_sfnt_off00012dd5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD5 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.