Malicious PDF — malware analysis report

Static analysis result for SHA-256 469a2a918c53389b…

MALICIOUS

PDF

86.9 KB Created: 2021-06-26 14:10:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 842187f9c8165b43cc0ef7bbd219b677 SHA-1: c7430f6dad1c34543df0b9701c26454b3994f465 SHA-256: 469a2a918c53389bba37dd20e3660e50f31ac7cd7541f4b814ee6a3a72dfd96f
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple distinct hosts and the use of disposable hosting reinforce the malicious nature of the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/bnqshto0a767tneql5815183f1/56827142233.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/17e90336bc4b462eeccba1baeff70818/betatofibakofiwo.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16079c151ba925---56931339652.pdf
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cba917e1ce5---sezafosozotujet.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b67ba65f2fa---bipazogenufedilokowowipa.pdf
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ce8fad639---73583841440.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/umlur6pha37o0q2dj3dcmuqvkn/26907528264.pdf
    • https://bmw-zona.ru/uploads/file/sajusukisonitokop.pdf
    • http://stphilomenaonline.org/userfiles/file/rotatabusurajizegir.pdf
    • http://allasclub.com/campannas/file/duzete.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/pjaousr1qpd9o7vlce5mhe5jj2/banewabedukirevosewutope.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/5ijqbqr1m1inqumgor6smeh5e4/fisowededug.pdf
    • https://amitadevnani.com/userfiles/file/6541939093.pdf
    • http://somogroup.vn/ckfinder/userfiles/files/80890612927.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/jdbc4c37mgd7lpdsnsr7ebldf1/35046534436.pdf
    • http://ahchala.com/img/file/dipinivapolevasemimekaral.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f56a4b26dc---67045342762.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9506ac2a1---wekovegujasupulipiwu.pdf
    • http://leaguengn.com/userfiles/file///gagokifuxuzanotezetusejob.pdf
    • http://beverleyannes.net/home/beverley/public_html/ckfinder/userfiles/files/tusokinajaboke.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4e08c3a1ee2ce8361752ca13620460d7/42415024526.pdf
    • https://avgdesign.com/userfiles/file/towavojasuligigifo.pdf
    • http://grandp.ru/userfiles/file/17562639034.pdf
    • http://www.knickmeier.net/images/pageimg/file/48643757754.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9ad676fc4---wutiwipatakowipoj.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/ca924d3b0ef4f20ce266572df0d2bae0/kawazuram.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=stornophone+6000+manual
    • 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_off0000f2c9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C9 16792 bytes
font_01_sfnt_off00010ae0.bin
b88d9e0789a534872d8269f2eaf5a17342f4434b2581bbcd486f5c7d9f7bca1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE0 10724 bytes
font_02_sfnt_off00012350.bin
dbbe22f309c666600c44a3e6183c6430a8ab71ae4bf95a43cfe17594ddb34acb
pdf-font-stream PDF embedded font (sfnt) at offset 0x12350 16592 bytes