Malicious PDF — malware analysis report

Static analysis result for SHA-256 098750cd6cee4992…

MALICIOUS

PDF

73.2 KB Created: 2021-07-01 21:48:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 61bfbd6f7ff795079b361fbd53f956ef SHA-1: 019201c1cd4ccf2f1689f661a75a039f5ba6b9d1 SHA-256: 098750cd6cee499291c94c0c80e479b8647adb57931251d1b4c88f41176455d1
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The embedded URLs, such as http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/06de7d58e5e232978e911748e985a4e3/vodekajitagimagudukog.pdf, are likely used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3af1c98f5---fepomajuzagi.pdf
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/ab49d7ff0b7a2e7d8f255076945971ab/jodubulot.pdf
    • http://on-video.com/movies/movie_data/file/95848386056.pdf
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/1264575aafd356decd2121b8a23e8bb9/vovuzaridupa.pdf
    • https://psfund.org/public/uploads/files/cms_files/5210724131.pdf
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/3b1bf9137962a17ab0fc67a5a5e5bf90/24621608084.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d8965d1665f---fobobabugolenavasororafo.pdf
    • https://noddy.nu/images/file/wobupozugujaloj.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/12708085335.pdf
    • https://dineflon.com//files/vugonitoxakoj.pdf
    • http://tourhong.com/FileData/ckfinder/files/20210627_F37500F1CA51B92F.pdf
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/06de7d58e5e232978e911748e985a4e3/vodekajitagimagudukog.pdf
    • http://joyearland.com/ckfinder/userfiles/files/marurewujaziruruzukob.pdf
    • http://kayapaliinsaat.net/file/97973764548.pdf
    • http://amadpich.com/userfiles/file/74917881721.pdf
    • http://domholidays.com/userfiles/file/45325963002.pdf
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070a473ce24b---90557780601.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c9337a2541a---89084815975.pdf
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f2b7bf6d3---44997210255.pdf
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608461a76d5c2---xevotikujebekoguxogojepix.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a460ff2a800---28858392505.pdf
    • http://sosnovgeo.ru/userfiles/file/65916582258.pdf
    • https://anthonygillant.com/userfiles/file/tefagogesotaxitanupo.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/50c12954161edeeaa234c24744684ca7/74531745110.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f13c70c01---sewig.pdf
    • http://ksnjl.com/userfiles/files/gonudiluduvob.pdf
    • https://aradovan.com/userfiles/file/53519845827.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=1+cubic+foot+to+cubic+yard
    • 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_off0000beb3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBEB3 16792 bytes
font_01_sfnt_off0000d6c5.bin
be8056f1ffb00c900c17c51aafa5ad72ba1f4fc4cc9e8bfac3071490e4d95f16
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C5 15872 bytes
font_02_sfnt_off0000ffa2.bin
70587edc3bd33176bb28d5471d045ee7ecb1c8858311b74261b07c808a27afbc
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA2 10328 bytes