Malicious PDF — malware analysis report

Static analysis result for SHA-256 0595fb6ab69d749c…

MALICIOUS

PDF

88.5 KB Created: 2021-06-27 03:54:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 06afff9337c18135b42bbc29e6d21461 SHA-1: d613f2def6d55cf0cd4030d19c5b99278cbf10df SHA-256: 0595fb6ab69d749c1b3c4ea7f3eee98f3fce5ca6cc7c786a6408b44d7ae2f3a3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by both a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting it's used to distribute or host malicious content. The embedded URLs, such as http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1609062127bfb4---79540741345.pdf, are likely part of this distribution network.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1609062127bfb4---79540741345.pdf
    • http://rosesrealtyhomes.com/userfiles/files/xagaketarazunulo.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9745691e04---suginipikajeraruwemepugo.pdf
    • https://kurishupally.org/userfiles/file/29293756817.pdf
    • http://rgn2u.com/userfiles/files/xesojotewekawej.pdf
    • http://meijialx.com/ckfinder/userfiles/files/posusobozow.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/0bffi2r9rnt3sg3hnev3efslfs/wadijobabewekow.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16075c3f698a99---82104898642.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e82b413776---6934716737.pdf
    • http://broadgatecapital.com/userfiles/file/gekalabugapakexapemegi.pdf
    • http://winterwonderlandzundert.nl/uploadimages/files/17301341596.pdf
    • https://karapinarinsaat.net/userfiles/upload/file/wekozesapadolizitidazejef.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc69c1d2db---73651617071.pdf
    • https://implant-drill.com/userfiles/file/80207687513.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3d172f2e3---zapuxuwapiposulakenib.pdf
    • http://grandchainfamilyfoundation.org/clients/85333/File/27802687277.pdf
    • http://casier-a-bouteilles.fr/file/beserawitabipekazuma.pdf
    • http://lavalnerina.it/userfiles/file/92333753741.pdf
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/380716e313acbf40253062013cb93f32/xuboxiwiriv.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16074852d7da2a---93478301189.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/5ff91468f41df189e7099d22a5b957e9/57387467970.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2c1e4adef---vekijeranujatosopogapafus.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c798ed97728---lawijagewofin.pdf
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1607e78111e5c0---52467598791.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=free+robux+in+2020
    • 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_off0000f61e.bin
63c4fb2227c021bdd80592e2d2a4f722157108ab278280439aae0a96698b4334
pdf-font-stream PDF embedded font (sfnt) at offset 0xF61E 10188 bytes
font_01_sfnt_off00010d08.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D08 16792 bytes
font_02_sfnt_off0001251a.bin
6004d041c0ae8ea80940ad4a172ce76596c7051781e1f97928f8b149af4f28dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x1251A 17668 bytes