Malicious PDF — malware analysis report

Static analysis result for SHA-256 3274112472670aa0…

MALICIOUS

PDF

86.4 KB Created: 2021-06-27 21:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 772740f3c10553f5da74068e8a7c5d98 SHA-1: cf9ff4c94e2654d3a16fbbbb00c4933d179b15d4 SHA-256: 3274112472670aa0580ce0efe87df703422ffd4e839767c6b079271c2c64fdb9
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the link farm and the presence of external URIs suggest the PDF is designed to redirect users to malicious content, likely exploiting the 'Spearphishing Attachment' technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b4504f6abde---57981550556.pdf
    • http://xn--h49avwqct32ewe967crscpsaz7d.com/ckupload/files/70921853223.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ad8685b56---76752311671.pdf
    • http://gdwtechnology.com/fckeditor/file/joduzipowur.pdf
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/25721596163.pdf
    • https://binarbaidservices.com/public_html/userfiles/file/joletimukojexukurik.pdf
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160744b954107e---vezukitozefo.pdf
    • http://ergo-logo-bamberg.de/userfiles/file/putavefutesatozaburor.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a350a4be4db---xunesazefitobigamiwovafu.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16095cf7569c1c---subekokirizitijanotefevi.pdf
    • http://zaun-produzent.de/userfiles/file/dezibubopanozatat.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/svrcsnogafiu1s7jo002t94m9r/10787209509.pdf
    • http://porpora.biz/imagenes/imagenes_contenidos///94389141633.pdf
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9483edca01---dejavodarafexejatebena.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/90ff90b307435232707906a7377a0372/59792669520.pdf
    • http://jiehuist.com/userfiles/files/mifex.pdf
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/2d61b82d4eb512970e78dfdf3447904b/88791859776.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/1d2055439baa9fbfb5f4d61dea126f7d/dofomigesasisitotikoruj.pdf
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/61265a02b2213dce9d9518059b5a89c1/riponagubax.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609477b3946ac---26743255544.pdf
    • http://kibbkw.com/uploads/file/82636099511.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d9546fc4e---wogetate.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/7f3c5dtqkl8lln5lafjtd093e2/tuwajonanege.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf1eac143cd---61580695819.pdf
    • http://allaboutdowney.com/userimages/guxoxotuzowu.pdf
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/l42k9lichpoequi9pk9ld8jp62/mozuta.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=how+to+make+a+journal+of+your+life+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_off0000ee70.bin
12cb59d89db22900136834e54e6827d263f016f665ae86a8dc3616b66093f001
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE70 11004 bytes
font_01_sfnt_off000107ec.bin
c636e9618932d4932a5c9ac8001c03c8a0aa65d685280b86c5d969c4bee93936
pdf-font-stream PDF embedded font (sfnt) at offset 0x107EC 17040 bytes
font_02_sfnt_off0001343b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1343B 16792 bytes