Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee2551cfbe19d161…

MALICIOUS

PDF

90.7 KB Created: 2021-07-12 22:43:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d6156c3f7220b4e88351ac22f7063834 SHA-1: c05a8115b5d713fe19940e6df65bce5fc25a320d SHA-256: ee2551cfbe19d16185c0003aff4dc3a44d294165857eda4bebda08f48e425abf
164 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites and are structured as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 https://aawyx.com/sites/default/imageuser/file/liverowebofoze.pdf
    • https://samarpanbharat.org/trila/userfiles/file/rafuletazutarupaju.pdf
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3c577fa36---15142498260.pdf
    • https://banghenails.com/upload/file/dijabifukifizonukivivuju.pdf
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/9b5a07fa48c497f630987d7a28c4f021/samenogesovavexodi.pdf
    • http://alliance-ic.ru/uploads/file/zalugojesevizaremomizawa.pdf
    • http://kamkmori.cz/ckfinder/userfiles/files/gijoko.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160adbec66c28d---xinabaxinufo.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/ce1f37b374ddf98ef7fc303f1fe2ef70/zosarijo.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4eba87e76---89733984431.pdf
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/76e3af32f3362491239826ee19012743/sefukupuvat.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f830436ed2---kavosozibutovitatesowan.pdf
    • https://bluza-shop.ru/content/File/xabunoxupuk.pdf
    • http://novussiteyonetimi.com/uploads/file/18069978655.pdf
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/r0r6fu5357iqrmc14tt0s58esj/tuwije.pdf
    • http://rabotatver.ru/userfiles/admin/55714331756.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b10f3156e---8582929595.pdf
    • http://kolkandkolkdesign.com/site/data/ws/files/pawomupetimafapenomu.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae743862b64---lojunaxonaviparujuvuv.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/f8b61e9b2563d4ac887870e4342bb0fd/gadovafufefof.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/np7bjtcnt7ept8u3gbn8v40jrd/64957998212.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e696ec389---92716968602.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=closed+syllable+short+vowel+words
    • 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_off0001001c.bin
9191d78d096fd2d10a4541e3cdbd6fecf50822846fb6c53f7f8f1b7f63d5cca5
pdf-font-stream PDF embedded font (sfnt) at offset 0x1001C 16844 bytes
font_01_sfnt_off00012b94.bin
eabc867e5ca720567757992bc98c3ea5dd22512875105a7cc79184fccb4a5f78
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B94 10588 bytes
font_02_sfnt_off0001440b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1440B 16792 bytes