Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cd3fb104382a3c5…

MALICIOUS

PDF

88.6 KB Created: 2021-06-26 14:38:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 895af2da8497e20e89f3ed323f00e326 SHA-1: e8985f40db178be104f50ca67d34e1a64b84f1e2 SHA-256: 0cd3fb104382a3c58603a16b4f7c065211dfa8f6ef5961105b2f28b5c07d1b17
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a link farm, with numerous URLs pointing to compromised WordPress sites and disposable hosting, likely intended to distribute malware. The presence of a 'download' button lure and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent to trick users into downloading harmful files. No scripts were extracted, but the overall structure and URL patterns indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd0d220f31---95967181586.pdf
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/ilemeg9u8qe3u5913v6m4t8u73/xidobokawapirupaxufalevu.pdf
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160869b5e78f06---zelurimipim.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9cdb402589---31898777339.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a44de9532dc---4489562056.pdf
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16083b0f1be631---bovomik.pdf
    • http://lnshiyue.com/userfiles/file/20210526060504_544078196.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607c703270002---117873237.pdf
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/ce1f61ec14950805a7843035a875cd9e/bimixunenurupebunipogokom.pdf
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/aa53d9c9f459b332575c5b0b133b9382/nujekanosaxamebevo.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd79525aca---93889493692.pdf
    • http://mygotour.com/FileData/ckfinder/files/20210604_BDF21A95E1BCBA68.pdf
    • http://hongdacable.com/d/files/21641674614.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/2945ccdef47dcb2fdc3aa1d81d428955/polad.pdf
    • http://www.anclupnapoli.it/userfiles/file/jokisarawafavofov.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/7f4h0omicvlqshnk85qruqmac7/pugetulotoborerevasitid.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/354aa00efa067a1bf59d863e667b9b48/50209790658.pdf
    • http://baigeleather.com/userfiles/file/zifukiwaxifaxokotep.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071cb8c0d803---81592079683.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b68821ce9---fotejosozudisujemejutepe.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d64e370be43---pisowek.pdf
    • https://isabellepieman.com/userfiles/file/dununejafa.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=idm+with+crack+free+download+zip+file
    • 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_off0000f52c.bin
2e6520c6c7df94d7f928c4e8682cf966f8b546095bd98e431cbda2a01d334e2a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF52C 17284 bytes
font_01_sfnt_off00012296.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12296 16792 bytes
font_02_sfnt_off00013aad.bin
23096ab58012f2a47a8d800f843281b60f4bc6f03a64da417875e97ab444c4ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x13AAD 10908 bytes