Malicious PDF — malware analysis report

Static analysis result for SHA-256 c44efe9f3716e2b5…

MALICIOUS

PDF

147.1 KB Created: 2021-07-08 11:22:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a67ebf9ac87a09974702c87f378cabee SHA-1: 31140832ac2f213cd66483ce0358dc0ad15af3dd SHA-256: c44efe9f3716e2b5753d9fd33151725fcf264a3a3c95452aceea1bba963f1200
124 Risk Score

Malware Insights

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

This PDF file was detected by ClamAV as a phishing trojan. Static analysis reveals it functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links are likely intended to redirect users to malicious content, such as phishing pages or malware download sites.

Machine Learning

  • Nyx PDF Classifier clean score 0.1867

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 https://huntic.ru/uplcv?utm_term=evidence+for+the+theory+of+plate+tectonics+includes PDF link annotation
    • https://aravlicraft.com/cmsCart//upload/file/40364908207.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/a17b88acc6fcb96f299da02008769845/42458238603.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/0bdce35091d54e64ebd43c5ca93ab14d/gobexin.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfcfdea10c6---runog.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/jepivuwufito.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/16096e6c46980a---40231170972.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/8cf55bd8fc1a65220f105665db8fcd6f/14234419642.pdfIn PDF document text
    • https://radio-aurea.eu/files/file/15250815702.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/2123929a45ffde0d52a428b7dee2b660/29950675257.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088e02d5fa98---63127199316.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca92d70e83---32947963208.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bf01d56db52---68324098119.pdfIn PDF document text
    • http://www.sec-ollivier-associes.fr/www/upload/file/73163424940.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/45ba7c9f92ffd33997674f78c0524be8/89758760558.pdfIn PDF document text
    • http://detikakdeti.ru/img/file/60549738841.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/rebajekizejutiwebose.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/68137914787.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/59517046448.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/93699015805.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16078aaff1aa59---2755379349.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/bogofijiniloraxupaz.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/f9275fdd12dcef224fd3b50ebfb70c4c/34133072730.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/46da7865820d0a2c475692b5597a1726/55911955309.pdfIn PDF document text
    • http://northwestpixie-bobs.com/clients/e/e1/e1941a3904c49320334fd90e0ed9e852/File/piseji.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/d1ebf727414e123dd72c8cf5d4faea47/26629395664.pdfIn PDF document text
    • http://mopron.ru/upload/files/pixegepuzuje.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/82h27ofjk80c0ftn0u2megnpo7/morededufil.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20621 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00021e38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21E38 10980 bytes
SHA-256: 285b3d7d6930e0c11ff8a8d762e69ead641f1dde9d3a8cc17e7702894c866cf6