Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9e9108122050480…

MALICIOUS

PDF

86.9 KB Created: 2021-07-01 00:14:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6b5c4e4966783e21365dac3eb4009fa6 SHA-1: 6d30f9ee1c041e6506ce5297bb56ae7276bcd108 SHA-256: c9e9108122050480f6059171d447f278b2ba0341357ba59ae427790ccf3bafab
164 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites, suggesting a link farm designed to host or redirect to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of external URIs and the overall structure point towards a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://drafthe.ru/uplcv?utm_term=crazy+coin+free+spins+link+2020
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf41d2e5a9---24594772471.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a69d40e48c0---94374896106.pdf
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/9b8172200c67065ef3f22767f3b3693a/86702832520.pdf
    • https://binarbaidrealestate.com/public_html/userfiles/file/74671638825.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf2b3ac8cba---negamorezukado.pdf
    • http://wecans.net/_UploadFile/Images/file/78979730697.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f3e666a36---68820230582.pdf
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16081e28ada282---36251209774.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/394c8cfaca112eeba4e85ba0ab12ac4c/zibegilodaxusebuwobale.pdf
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/8b72050530be901b0b3e78f3f770279f/56501917722.pdf
    • http://aelma.com/sites/default/userfiles/file/68447049431.pdf
    • https://chandrakantmusicacademy.org/ckfinder/userfiles/files/19665999791.pdf
    • https://fwullong.com/upfiles/editor/files/rumefasaxujimekafimoga.pdf
    • http://mywayrtk.info/userfiles/file/19252882356.pdf
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/02951f09805215fd6271690e17baaabd/laturodosepuk.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608337d44510f---18523355830.pdf
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/697646a5eb5fa0a7897cebba1a1a3a0e/vexoburuzoluvunimegatoj.pdf
    • https://chiuman-hk.com/images/file/nekadarimawajepapilo.pdf
    • https://isleo.com/i_photos/file/xubepawod.pdf
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/03d13457b6823d2edb4e4715427497da/42819949278.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160710bc8ba54c---34940059900.pdf
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d39a51156a---62190120055.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_off0000ee55.bin
35e1cd5ab056ffb99de81f56348592257b2912999d47c6bd87d0fbf0306db6b3
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE55 17888 bytes
font_01_sfnt_off00011ce0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE0 16792 bytes
font_02_sfnt_off000134f7.bin
031bcb5a71cdca3733be336ed77a1da602a1bb15701f424bf6c10146d77bbf30
pdf-font-stream PDF embedded font (sfnt) at offset 0x134F7 10912 bytes