Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e9d8def5f10a2ab…

MALICIOUS

PDF

93.4 KB Created: 2021-07-16 16:00:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0244cf939f39bbbc074abd55163e558e SHA-1: 1185f3b45830682b36b1b96525033d5707f9cca6 SHA-256: 0e9d8def5f10a2abc7b1cbfa7f6d774ff9134e0f11776ec5440383aea728b7ca
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://wastran.ru/uplcv?utm_term=comfort+pdf+to+excel
    • https://aawyx.com/sites/default/imageuser/file/mivegedamisexakefa.pdf
    • http://sity-luxe.ru/userfiles/file/tirive.pdf
    • http://hnsunnyfood.com/d/files/jamafular.pdf
    • https://alakharia.com/public_html/userfiles/file/41083815167.pdf
    • http://dinskayarealty.ru/media/file/nanenumotozokefekevekuzes.pdf
    • http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/41658955340.pdf
    • https://aprilboya.com/userfiles/file/bepuguralaxikizelixerevi.pdf
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/2bdd9794fdb419f0d4034c01e3136124/sosukigebolazusigivudegal.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/t6vead64f7i54847dgcmqrk57r/pejuparekomopekub.pdf
    • http://bestofbeer.ru/ckfinder/userfiles/files/51211760567.pdf
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/ucrlfe7vsds9dq7d522p7al700/kaxagutugusuno.pdf
    • http://monkey-do.net/userfiles/file/dopepikedabeditapuzuget.pdf
    • http://sns-russia.ru/userfiles/file/39953390139.pdf
    • http://barcelonasixtytwo.com/userfiles/file/kexuwigipikud.pdf
    • http://funperm.ru/content/file/mikujos.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/79397926876.pdf
    • http://chekeeh.ir/basefile/chekeehir/files/ditupuzilikek.pdf
    • http://hytechplus.com/userfiles/file/rimaratabosanulerora.pdf
    • https://zivotzaokny.eu/res/file/89486447530.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160840e63676a8---kewum.pdf
    • http://euro-ex.net/images/blog//file/fesus.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/66aca55b52a137757ed84b079f1139b3/rumuzewetikab.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_off00010bfa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFA 16792 bytes
font_01_sfnt_off00012411.bin
3e1f1020610c08a2c03f324994cb319353a4892e408b89f9cd00e78b6ad38ede		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12411 10388 bytes
font_02_sfnt_off00013b9c.bin
12c8e1baa379e1ee582c4795d537985bd815365fce0da36164ea0a0e427fc4b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B9C 17348 bytes

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