Malicious PDF — malware analysis report

Static analysis result for SHA-256 a565dfdcd382abb9…

MALICIOUS

PDF

68.5 KB Created: 2021-05-24 04:49:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8c581610b05cc0daf7c21f4803be3aa SHA-1: 3613bddd206f6555933ef2d39a9ff424d82e6926 SHA-256: a565dfdcd382abb9168244f67cc6a5ff36979e3d9665811a313a8b3570a201e8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midel.me/userfiles/file/bizor.pdf
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa66eb7164---jutowudorigabewafijixij.pdf
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/0acba568eaddb23ddf0b13f359f27d7b/fenitafazeri.pdf
    • https://activepymes.com/pub/file/62751631786.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/e19a749c6123e1d228e8df31241ff214/43629263618.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/0830db919cdeb51ee04ccf010fa3ac31/nazurogenijipasokasewel.pdf
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/16072aafc41249---kejemaroxelozoguv.pdf
    • https://alianzatours.com/imagenes/file/85998190142.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/qecfttharifef73otv8j2qs865/xezezufuribenopebelofof.pdf
    • https://alnahamgroup.com/userfiles/file/bosopalabubijotaxipuzavos.pdf
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095d13558368---19707403960.pdf
    • http://asupuro.com/user_data/image//file/94231666622.pdf
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/ba47436cefddfbc3ca46da42b480be16/jivoripafala.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/6daf3809aa9e8186e94b03c95908234b/tiduviri.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16079b357850b2---futuwoziso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=edtpa+lesson+plan+template+google+docs
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ceca.bin
adee4ce0a239496ca9c0ffcb06bd953961e8ebb259a24860bb0560a58e5d0c9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCECA 5256 bytes
font_01_sfnt_off0000e09e.bin
922b8be17802dd7de2cf8a88d014f278f39e825d94d2c49154679e46f30e4a28		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE09E 10560 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.