Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c359175986c41ce…

MALICIOUS

PDF

91.4 KB Created: 2021-07-09 16:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aca3a66ae7a49e83298a9ec96b220369 SHA-1: 626a67b424877f3d5260455658ffffc8d73bef87 SHA-256: 0c359175986c41ce220a1936024f66fb060c6161e4cb40d9060ddb67f2573023
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document contains a link farm pointing to various compromised CMS upload directories and disposable hosting, likely serving as a lure to download a secondary payload. The presence of a visual download button further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://maciejabramowicz.pl/upload/files/file/zovadi.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/6293df9ddffe6535f0b2dbd7097ddbfd/55598892895.pdf
    • https://licorne-hotel-restaurant.com/userfiles/file/67541746968.pdf
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/ekc5t0ur52rno75174qr7ppmep/23457407812.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a67426bea54---pubemipirurolunazudesijiw.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d4738f169ee---ripujokugapukatigemexe.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/c9d082df715c9b068b992d8909977176/39484934030.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/1c06723a279e36f8edd704ef288f0896/81536513857.pdf
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/155140t30s7d0erb6ldvrts9tt/vepanut.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd25546dda5---netevitixasumuraf.pdf
    • http://learnazia.com/fck/imagesfile/vuwer.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/01a18e6635c879b31a706be97a6892a0/51740574756.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/4b4ac67728831642be1fe4201dc4c10d/76385912836.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a32d5731bb9---kijizizududosiveluk.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16096bc1f541b9---fegovuxutedizejugigakov.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/5ad5547e40929fe2050a4da10fd3a185/46126948234.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bfff611c2fb---30280381269.pdf
    • http://jarosi.hu/files/file/pigefes.pdf
    • http://www.parkwaytransplant.com/media_upload/upload/files/40914897187.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/l09da2qkg8lr08so6nhfisu82a/xigida.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/d899b4a76e24059a9747b8de7357661e/62449374008.pdf
    • http://apluskleaning.com/admin/images/file/safijapakob.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608683883669a---vigekiditimoguru.pdf
    • https://celebicatering.com/upload/ckfinder/files/43777125420.pdf
    • https://lamthong-marchph.com/piceditor/file/xosuraruvuwegi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=wing+t+offense+playbook+powerpoint
    • 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_off0000fe2e.bin
376654530dede2700b32f76eba59e35403ea5f151f59b5b5977fe841e8e64e29
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2E 18432 bytes
font_01_sfnt_off00012cef.bin
a8c1ffe53f8126fbcbedb62d335bf34d731267818e5ca6c0bfbcdc54c0a8d014
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CEF 10956 bytes
font_02_sfnt_off0001465c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1465C 16792 bytes