Malicious PDF — malware analysis report

Static analysis result for SHA-256 02d6b07e5c88333f…

MALICIOUS

PDF

93.0 KB Created: 2021-06-26 00:44:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dc7f29641d6870f524b34cd58185d96b SHA-1: 2aaba397f2f76252845ea015364b90a71a54b9f5 SHA-256: 02d6b07e5c88333f03fb716bb24ab2780b7a753e1dba5961b6fa04f1dcc2641b
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised WordPress installations. This suggests the document is intended to lure users to malicious sites for phishing or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://asupuro.com/user_data/image//file/betugujiv.pdf
    • https://fallsplat.se/file/89359949029.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/47fd51ec4c8e84b6a7e950995834938a/93562864592.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ea5ae6315---12745256297.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/21d85c8bd14db9634206fd1b5643b70f/49973807995.pdf
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/f32e61fba05b3ce76ec4e3abb6100286/fovopadosuguvufutajutemi.pdf
    • http://hakkabrothers.com/userfiles/file///votodozen.pdf
    • https://collegemahan.ir/basefile/collegemahanir/files/ritolurokobabinopeja.pdf
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/9qondb9ckckge8qvqaau4imscf/75209105415.pdf
    • http://smn68.com/clients/75339/File/wuzowumumoz.pdf
    • https://malashealthcare.com/userfiles/files/pizutabozaruleg.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160986b5b043cc---11060438071.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609c62355c22d---gijal.pdf
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/62dc2cc47108c6afc5f1f1e23d44c6e1/25502434665.pdf
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/cmocfj3dk6klbnmc3m7793lvms/fitudupop.pdf
    • https://xo-sound.ru/userfiles/file/dovumupamuzezavibadi.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/86dbcbbdf208b4e3ec72db816cce4f72/23211173844.pdf
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942f6290a94---16027363.pdf
    • https://soportedevida.mx/ckfinder/userfiles/files/nuletubotilepapegim.pdf
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/4dd6b4175cb4c831ea91288213f24e2f/15292585731.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160954f0a6be2a---22233072352.pdf
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/1lvr8t86o1vn68k4l4fkp9vhh9/73915713723.pdf
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/d78a8d6108418ecc936398ffd3b44a38/79114382826.pdf
    • http://yeosingol.com/FileData/ckfinder/files/20210615_14EEE5AE454AB6AA.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081181a1e2da---bekedogejedonifegimojum.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=song+about+matter+in+science+lyrics
    • 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_off00010445.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10445 16792 bytes
font_01_sfnt_off00011c5c.bin
ea793545f4822a618d30c2fa97f4b57120f35103879dc3a6a981c4e84d68fb0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C5C 11004 bytes
font_02_sfnt_off000135f6.bin
aeefa81ab50312b42ab73f20e3b9326bc7783656193e7a2dc222310c32b06b53
pdf-font-stream PDF embedded font (sfnt) at offset 0x135F6 18204 bytes