Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec1ef3bdd9705af0…

MALICIOUS

PDF

86.1 KB Created: 2021-06-27 11:46:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: acbba1157a11a6c9d5a86106395a1a52 SHA-1: d82fb3d47cf1f3fb161e238964876dac45697d18 SHA-256: ec1ef3bdd9705af08b150095a4b0d90eeafb27c2c8247f6624aa3f03284eb804
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm directing to multiple domains, including compromised WordPress uploads and disposable hosting, which is a common tactic for phishing or malware distribution. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. No scripts were extracted, but the structure and URLs indicate a phishing or credential harvesting attempt.

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 http://sns.hu/_user/file/sileruwagul.pdf
    • https://fanaf.comarticle_ressources/file/fifafoxorisoridam.pdf
    • http://guides2alpes.fr/uploads/file/69081075137.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be4b90bf7d5---98020687191.pdf
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/f256acb31b16b452499116d4b384434d/64981007515.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b3156bc6f82---71389266529.pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/ff4f091c213914480d7688718067fec2/18862376024.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/at10psr3je7gahv8n6ja2u55bo/92564412713.pdf
    • http://energo-market.ru/sadm_files/35574706372.pdf
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16085cfae4a277---41787845515.pdf
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160717f6771bbf---dajupabutijedenilu.pdf
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c085f019428---wakivuniredetowizewogojib.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/e0827a200f1d10f34ae5010c6199f0d0/wusujilonafolemuvuvulodok.pdf
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160848c0c2ecf9---26603116702.pdf
    • http://dalnoboy.net/data/filestorage/upload/files/lasovizomujesab.pdf
    • http://adveotec.com/img/file/19971249465.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/f2df323f03ca9083c119e8a07a5cd8e8/3826553588.pdf
    • https://luminex.pl/upload/file/badinufetoferejisudik.pdf
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/1d0f04d74588700211d78e433dc03d4d/75294235271.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3581166478---83743347999.pdf
    • http://bora.su/ckfinder/userfiles/files/zubufopi.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/b80822ebd7a9d190b0de90e159f801b2/11975672088.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/fijh7ocoisb041g2hdkidtcdn0/nofobavivutos.pdf
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/1ju3kd0oo89eloe9t9k0c76vq0/kajumarun.pdf
    • http://chataphan.com/file_media/file_image/file/xevarige.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16098845551ffe---93893228309.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=aircraft+schematic+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_off0000ed68.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xED68 16792 bytes
font_01_sfnt_off0001057a.bin
f2319c26bedc5e3dcdd2357525386bc55ab9dcbf1f313d78bb3ae210d4c38126
pdf-font-stream PDF embedded font (sfnt) at offset 0x1057A 17452 bytes
font_02_sfnt_off00013349.bin
2e459312f2c76249aefafe9e01f401f1019174b42e0c21da9554c86189c0dfd9
pdf-font-stream PDF embedded font (sfnt) at offset 0x13349 10564 bytes