Malicious PDF — malware analysis report

Static analysis result for SHA-256 38e81de1d56b2189…

MALICIOUS

PDF

60.9 KB Created: 2021-09-27 20:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: bef62f236dd5d9b6d2cb316249e4a3fe SHA-1: 4633410d122144a0a1da9d55577e450b7f616353 SHA-256: 38e81de1d56b218905b448187e297ca3b5000e8326feb16b07765e4a6f73e54b
124 Risk Score

Malware Insights

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

The file is a PDF identified by ClamAV as Pdf.Phishing.Trojan. It contains a link farm with numerous external URLs, several of which point to compromised WordPress upload directories or disposable hosting. This suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4641

Heuristics 5

  • 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
  • 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://prosaison.fr/userfiles/files/51235584224.pdf In PDF document text
    • http://pentas.eu/userfiles/file/39394545942.pdfIn PDF document text
    • https://nusantarabet4d2.com/contents/files/dedaperotugelogorigeviriv.pdfIn PDF document text
    • http://esejsc.com/upload/files/11370447721.pdfIn PDF document text
    • http://aczelzalog.hu/tmp/99382097783.pdfIn PDF document text
    • http://web5gstore.com/Files/files/6421122150.pdfIn PDF document text
    • http://reklama-kemerovo.ru/files/files/nurilexikisifatozasuzolom.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16146a40d1019d---88685701056.pdfIn PDF document text
    • http://schokofontaenen.de/idata/80126175566.pdfIn PDF document text
    • https://myreply.mobi/snappshott/editor//file/bizorukatuzewipak.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/file/696080843.pdfIn PDF document text
    • http://charolais-hessen.de/write/userfiles/file/fifawarolupa.pdfIn PDF document text
    • http://studiocalcinoni.com/userfiles/files/98105474470.pdfIn PDF document text
    • http://budaors.varosom.hu/userfiles/files/4383603676.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141849d6d996---86944903942.pdfIn PDF document text
    • http://titadoorbinhduong.com/upload/files/dojafuvojotumejitukagepu.pdfIn PDF document text
    • https://www.fyna.com.au/application/third_party/ckfinder/userfiles/files/46501433502.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/xolodemafamo.pdfIn PDF document text
    • http://launensia.cz/ckfinder/userfiles/files/60166639108.pdfIn PDF document text
    • https://fond.ru/userfiles/file/xosazoz.pdfIn PDF document text
    • https://sogelec-eng.com/files/ckfinder/files/27391950964.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612f466b5bae9---63986422724.pdfIn PDF document text
    • https://hotelexpert.ro/uploads/files/90431544798.pdfIn PDF document text
    • http://agedwedfjtj.pretty-match.com/upload/files/14523553849.pdfIn PDF document text
    • http://muabannhagiare.net/images/uploads/files/20504239450.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/bojozumunarewajaza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=atube+catcher+mp3+apkPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b3ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3BA 15848 bytes
SHA-256: 7cdb2cf1e72e39294d45c869f02b3cf3629b452a32b495c1cf8814e10a997db2
font_01_sfnt_off0000dbe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1