Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f6542716ad785e7…

MALICIOUS

PDF

85.9 KB Created: 2021-07-14 01:28:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fa61c81568f65fe3248b2d63067d086e SHA-1: 199410a6846aad113e0f019ae9e2ece65ba24f88 SHA-256: 9f6542716ad785e7025e9953d83966c251382f598bdef4f0c0131a9cfa57de80
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, with many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

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 https://roc.mn/uploads/files/2018035816.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a31a822501---90256736867.pdf
    • http://phpiratesbooster.com/clients/867602/File/wewewipokelipuwofetepuko.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160876703bd66c---sitopowufiduduporifu.pdf
    • http://praguetransfer.com/files/file/30667794002.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c12c4f9b3cf---84853872113.pdf
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c54e26e6a---44852909456.pdf
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/9h72fdb2dv4gv5u0mudbqgqtth/30474209143.pdf
    • https://cottonweb.net/userfiles/file/615198855.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/musidf2a0lqdm39jptvmsnop6u/xepemaga.pdf
    • http://ed-web.cz/userfilesfile/17752101333.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ee8ca9f60---67369804730.pdf
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/1338502972.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/lcefac90blvv8k2125niup3prp/daduxivesekirononif.pdf
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/61709496937.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d611d54b81---nebugupurunivexubali.pdf
    • http://www.moyekolodin.com/files/woniv.pdf
    • http://alnadaoil.com/userfiles/file/dimepedi.pdf
    • https://cplastik.cz/data/cms/file/safivesogidawozopanexis.pdf
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/t44vj77hrat2f6qso6bsgppuv6/44723018208.pdf
    • http://biosurfest.com/userfiles/files/81306580071.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bfd0d401c1---48022639401.pdf
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/a751aabolj91o8n3mlop3sj35h/761326914.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b19c1c95ab4---timexelite.pdf
    • http://accessiblevehicleservices.com/userfiles/file/xelinifix.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=hospital+planning+and+designing+books+pdf
    • 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_off0000ec4c.bin
02565f7d684c35479dc20ccb9e172b4e99a99a59a21f05e9ee36c19f5084473a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4C 17308 bytes
font_01_sfnt_off0001198c.bin
ffb4c37e96d1c7c17cb385ac3187390d892a579f71a2086dceefeb25102c9081
pdf-font-stream PDF embedded font (sfnt) at offset 0x1198C 10796 bytes
font_02_sfnt_off00013216.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13216 16792 bytes