Malicious PDF — malware analysis report

Static analysis result for SHA-256 06bf243dcab275c2…

MALICIOUS

PDF

79.4 KB Created: 2021-09-03 18:54:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4cd0fbc871c986ac1ad311c524196830 SHA-1: 5b33d5a5ffad9cffcfcd9df5e2a6e4169b97bfe7 SHA-256: 06bf243dcab275c220d8bf1f12422e2a4e5a42c7f688e627e631508f731e9c7e
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers. It contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting, suggesting an attempt to redirect users to malicious content or phishing sites. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a focus on web traffic manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5142

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
  • 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
  • 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://archgeo-leszno.pl/uploads/userfiles/files/51164468058.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/7953f5a1466a863d53d7c952ebecf9cd/89533760774.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5689900a8---30963366930.pdf
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/a34f36b4b0acec0d873bee63fa1216d3/rabosesopojoje.pdf
    • http://hutergroup.de/userfiles/file/mupakomalamifiwew.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086bacce1b68---fudorixoda.pdf
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/6f630d90796785f0e566b373a01b884e/dupiw.pdf
    • http://ristoranteyuri2.com/userfiles/file/zizewalibomunikelulewi.pdf
    • https://fier-forjat-valimet.ro/ckfinder/userfiles/files/23548954829.pdf
    • https://wagaskar.com/media/vugefogigafir.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/88518e33fd7f5b9be1fdb997a567988e/58808695607.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/00b1b9b76f48daae420bf75def5b7f99/limupovef.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610cf7bfa224a---2703182847.pdf
    • http://thewellmanteam.com/userfiles/files/58841193055.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608452f9acd85---murowepe.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c705a1452a9---jugabinadudovizegegak.pdf
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/e2116876660643487b23ead9cbc5a9a4/lojelif.pdf
    • https://tonwen.org/userfiles/file/52962552249.pdf
    • https://aakritidigitals.com/userfiles/files/nodubavapal.pdf
    • https://mmszke.hu/files/file/siderurakivo.pdf
    • http://terezszilvia.com/images/uploaded/file/36898155269.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/45ce69139e58683fe0a7434d2bd34dbb/ropevozumeboworovopifobe.pdf
    • https://nyig.com/files/file/zukemozanabirafe.pdf
    • http://www.niziointerior.pl/upload/file/xonefogeket.pdf
    • https://anup.bo/images/files/78493814859.pdf
    • https://vegas-shop.net/uploads/files/tapiwatununatovex.pdf
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6235338f37---54561015815.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=permutation+examples+with+answers+pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f001.bin
9182756c44f8585bf86137a26794f3648434f6f6d73daddd8285ec0e80b1b7b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xF001 18728 bytes
font_01_sfnt_off00012187.bin
5e1b6e1e785b006329c6ba0d58a6c6005129b31a1317da1687375e6da0bd3f4e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12187 11052 bytes