Malicious PDF — malware analysis report

Static analysis result for SHA-256 689dac2225c1dd3d…

MALICIOUS

PDF

86.4 KB Created: 2021-07-07 02:21:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c6a7c94c7bfca3c71c462508e8c83515 SHA-1: bd1e5fea59a39abf3ef08c0a75290e6ad600e9d3 SHA-256: 689dac2225c1dd3d9429ad5d7dfb8e15f81a80f3cfc8a6f8dcec3f389aa0e42d
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of an advance-fee scam. It contains embedded JavaScript, likely intended to facilitate the scam by redirecting the user to malicious URLs or downloading further payloads. The document body is heavily obfuscated, but the heuristics strongly indicate a phishing or fraud attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608140309466a---54424926209.pdf
    • http://exmar.it/foto_fck/file/nasolokolokesinezemaf.pdf
    • http://sarljarry.fr/userfiles/file/gunatatatikasopo.pdf
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160977c64b2e64---xudotewurafevelupufek.pdf
    • http://aptchasers.com/FCKeditor/userfiles/file/61954371715.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1609c175a10482---32100045961.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/0046fd21327759be94581c9a8ac47771/lafupinudapozudawiso.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/c612fca335e4333f46e0bddfd961c1ec/80541345901.pdf
    • http://bigandtallking.com/userfiles/file/19262412413.pdf
    • https://pet-fashion.ro/mm/file/nesixifuveso.pdf
    • http://albarossa.jp/js/upload/files/sebagezoboxajulunobuku.pdf
    • http://nappsa.org/userfiles/file/44885865529.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b04f0743536---tilomabusajotiwunilav.pdf
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9af89534d1f63238f0550b6eb125f5ba/66432055841.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd4059e240---12916829564.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16082ef085f2ff---konodeluburora.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f2f45d83f---pufuf.pdf
    • http://reelproductionshd.com/userfiles/file/manoxefexunel.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/vcmu43a5ee8gdqegp0qsmpcmif/navibogobasemoz.pdf
    • http://billedbutikken.dk/articlefiles/file/2179270762.pdf
    • http://skolicka.eu/foto/images/file/65745321299.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aadb66311f6---dufewezixunonanobis.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160740716f25ab---58573447845.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=bewitched+tabitha%27s+cranky+spell
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/d7fb4a89cf244413b14889faac541322/93565936864.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_off0000ef9a.bin
2f08682da69931d455fdbabf52515f04900b5cbface91292cb065a5d6521d5c2
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9A 11012 bytes
font_01_sfnt_off00010910.bin
5a6209fbeeb55864c22dbc0005b9b7a5b2cc2b89316aada0557788021c736062
pdf-font-stream PDF embedded font (sfnt) at offset 0x10910 16704 bytes
font_02_sfnt_off00013410.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13410 16792 bytes