Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e04e334c78e260b…

MALICIOUS

PDF

118.3 KB Created: 2021-06-29 11:36:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2ccfa7d7c1ea2d639455097c46e9b68a SHA-1: 70ae0f4883fcb281c26d824b09fb0cad057e43fb SHA-256: 5e04e334c78e260bb959bd5b37e41be1a035f399709c6f00041ffdad42377c9f
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to compromised WordPress upload storage and other disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document's structure and embedded links suggest it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

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://wellnesszeewolde.nl/site/data/ws/files/fepaniwiguxinekukagipir.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/l6g3tt08amlc44qng9lfgjc751/27891450755.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4199992319---garebivebipur.pdf
    • http://jaika.in/images/documents/files/nitiwitogi.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160772872bf6eb---josopekigal.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9f4dee224---53216966470.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/970989c83d71d342eb7a83e6d18ee266/luridini.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608641bad5e42---kuwewovi.pdf
    • http://sosnovgeo.ru/userfiles/file/96174617799.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160cb4e53ae64b---64004569398.pdf
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/6db42dfdaeb363538cdf2a91a29e7b19/wugolepegudifexugi.pdf
    • http://biomassasia.net/data_ed/userfiles/file/41377550750.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/b38a76a1856df1a165018abbdb960186/woxilaxagudabewul.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/b0d05da38338fcef498bf7cded07217b/bezuxafixegevadak.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160a6e7d3a055f---dupatusoxitobivujatagox.pdf
    • http://sjhrz.com/images/upload/File/57649538774.pdf
    • http://zxpgw.com/userfiles/file/3839273471.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a510e016f9e---ruzoz.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/ce1ce982e7bfaaa37d98818dc499ed61/44190480501.pdf
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/jjuq2ckebik6g5h2g34jophd46/feronozi.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609422d8208e8---mifozunajufidolosinusoluw.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/tpd07rpqvthpo6vufk75srr1eh/mudoxuvugijimiretikaza.pdf
    • http://amphorabeautyclub.com/campannas/file/42422923723.pdf
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/6un8qjqjoc6ns6vf825v5f7r76/witakabafurexajapixibifik.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfc56cac368---ratoronavotopupiponazit.pdf
    • https://gbagencement.fr/uploads/file/gerumajebijibekukud.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f16d3dc511---2526693361.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=words+that+start+with+w+and+end+with+b
    • 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_off000143ad.bin
8179888e0950df1d8e63561eab86cf8bdaa4e727aeed8a6a183e6f98426bef47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x143AD 48260 bytes
font_01_sfnt_off00019b6e.bin
635ab8bc1db4f247f2b5c93f728601b9e895eed0da2c99e0f99a1f428da5d687		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19B6E 10516 bytes
font_02_sfnt_off0001b35d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B35D 16792 bytes

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