Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d5f98ae69a063bd…

MALICIOUS

PDF

133.3 KB Created: 2021-08-09 16:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ce7aaa7612234e6496f5f66628f5af35 SHA-1: c01f32f4b546aad6496e18b17fb9a6d0c89988a8 SHA-256: 4d5f98ae69a063bd00f586796bbc46245fdeac3421ea69e2ad32a4f0f1e442e4
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document likely prompts users for sensitive recovery information, a common phishing tactic. No scripts were extracted, but the presence of multiple external URIs and the overall structure strongly suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://drafthe.ru/uplcv?utm_term=how+to+redact+text+in+nuance+pdf PDF link annotation
    • https://bharatbiodiesel.com/userfiles/file/59724920071.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/3754469440.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/vlusu1nhua51n9oq5p9kieh4i0/94623183192.pdfIn PDF document text
    • http://microcement.ua/userfiles/file/jomapoxapizoloror.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/nalanixo.pdfIn PDF document text
    • http://ingegnasrl.com/userfiles/files/lekow.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c28e5bc6db1---50132083956.pdfIn PDF document text
    • http://www.climatisur.com/ckfinder/userfiles/files/76319501357.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/dijijiwadirafasipivilifi.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077363304af6---dewabevilikusosebevomak.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/dp96pmdtnub0anv68ve70rvesb/33921308502.pdfIn PDF document text
    • http://studiosaletta.it/userfiles/files/69332281599.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3a27c94d8---popuwavilukorobojo.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607339de2807a---64415630452.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/52341731244.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608171a2bcdbc---56289287564.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4e30428e9---dizaratejavenime.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/166b99a3ed4bdeae12ef2e92b975af89/fuvobegovosagovi.pdfIn PDF document text
    • http://krakowska98.com/zdjecia/fck/file/50794486937.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b4182154f6a---zawutabipovirizazaliledo.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/ae9d0a373504ef5ccff613ba42905130/47734601502.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/af957e8ae21c4fffb49abb1f8f9f7835/96996244183.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c54a9aaadf0---82664626128.pdfIn PDF document text
    • http://szwygs.com/upload/38850849358.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/42265939940.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a75f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A75F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001bf71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF71 17472 bytes
SHA-256: 86ae7e210a397d79ddf6f75437f291540729872c124544833097d314d124f78d
font_02_sfnt_off0001ed8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ED8D 10676 bytes
SHA-256: 3d7ceb7ae8fc77c9260862db5466b9e124677632cecd73c2064b425e4e67938a

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