Malicious PDF — malware analysis report

Static analysis result for SHA-256 3007efb1565a031e…

MALICIOUS

PDF

83.7 KB Created: 2021-06-25 18:17:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ddc75be7f62c309b659c1948db3f2652 SHA-1: 5bbf1c5c536590e452e42db507a5bdf0f6dd9165 SHA-256: 3007efb1565a031ece1faad5d31cd69b82c81408cf89238603354c04ca814c38
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the PDF structure and embedded URLs are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a224938b12d---jodamawazirajorudazuko.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/tuchvh18nhn65426goorjfuju6/xevovevifepusul.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e69afa8caf---fonasirepufejonarig.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc92b07b3f---76122037961.pdf
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/0009e457674797616875e2fe65d43a2f/nogisuzurafikabibisegitig.pdf
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/b1993898b9b7960dd3fa775d7eb2c439/94510443090.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16094126d08779---kubanikovim.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a42bbcd1311---xonorutigewivu.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b43f10cf1ab---dukowuguzawox.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a4dc2fca8b9---44695714485.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9983ef7a5681a86e94e30a7173aa08e7/venizuzetidarapuw.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c44de7a5b3---81074581345.pdf
    • http://jpind.pl/userfiles/file/sonezemubitujemu.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd8d34cddb---86982572783.pdf
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/g74de5ts0q9tq4amt7g5j4flda/59397073439.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080457bbcced---76760974007.pdf
    • https://svrcontractors.com/wp-content/plugins/super-forms/uploads/php/files/4080af2b31d558337016c0ee753d200a/tolevezebanajurivujupefi.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1223d3c16---77239934234.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0830e85ce8---60661714577.pdf
    • http://www.centralperdana.com/file/92201677869.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=army+pay+charts+2021
    • 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_off0000e6a2.bin
c13f7f39e5bbdefa711c2d149a87de2c87722e07170b1504396db68bb6e31733
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A2 10532 bytes
font_01_sfnt_off0000fed0.bin
03d122b11acce37dd28b48e457c7a7e2a69eb55240a3632dc9a168dad7f04319
pdf-font-stream PDF embedded font (sfnt) at offset 0xFED0 16504 bytes
font_02_sfnt_off000129c3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x129C3 16792 bytes