Malicious PDF — malware analysis report

Static analysis result for SHA-256 00cf482710e97034…

MALICIOUS

PDF

82.6 KB Created: 2021-09-07 21:55:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 30012275e376fe9faa93f4c54a114bb0 SHA-1: d5908c8faeb3571162aacc9f2dbf56ae5aa69552 SHA-256: 00cf482710e9703454ae1ad94c89402327a681f77db9e35a9f1bbdfda9177490
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous URLs, many of which point to compromised CMS upload storage or are part of link farms on disposable hosting, suggesting an attempt to distribute malicious content or phish users. The document body is heavily obfuscated and unreadable, but the presence of these links strongly indicates a malicious intent to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://drafthe.ru/uplcv?utm_term=digital+signage+solution+pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5520573c32---87535493848.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077dc1760080---82687851309.pdf
    • https://hkfew.org.hk/ckfinder/userfiles/files/neberaxujemem.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/k019a4uhgguejt22pv32germos/60798407505.pdf
    • http://jocoseatee.com/userfiles/files/64063134848.pdf
    • http://thuexedanang247.com/uploads/image/files/42941918022.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/rps2fmsq1gmt31si98kkeclqpg/24662357286.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/e5237765b06f8d6595bb765012116dba/rilamofi.pdf
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/a35c5cd2ed866986871ee3442e98f185/79098715341.pdf
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608776a79f776---noledeniladazajapol.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089022c3d93b---7571558165.pdf
    • http://sbnjl.com/userfiles/files/resonowovaz.pdf
    • https://hankilfood.com/upfile/files/83407981949.pdf
    • http://madurastones.com/userfiles/file/zesagudebot.pdf
    • http://jatyn.cn/upfiles/202107/file/1626480469.pdf
    • https://rcot.org/userfiles/file/wuramuruvigemusufabupo.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100d375dbc07---gijazoxagaxoludar.pdf
    • http://hnsunnyfood.com/d/files/38288065134.pdf
    • http://studioego.cz/userfiles/file/wuxeteragofibulupupuba.pdf
    • http://salt17.com/userfiles/files/tolaworododutureme.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608be0ffc04dd---pusurojan.pdf
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/95470c5098378f8ac7451b4e2ea626f2/67803341419.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/a3c90dd692aca327ba151bb2b4837dbd/75132800723.pdf
    • http://taiwan-casters.com/userfiles/file/jajozisolimazuvononid.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_off0000db73.bin
eb241d6b8d4c084c9e47d605aba5f601c37cf3efd30455335decd55894516027
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB73 19552 bytes
font_01_sfnt_off00010c85.bin
bec5be9b18288655de991156175f9b1ce5dbcec907187a361e46a053855382ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C85 10676 bytes
font_02_sfnt_off000124ea.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x124EA 16792 bytes