Malicious PDF — malware analysis report

Static analysis result for SHA-256 961f08fd695eefa4…

MALICIOUS

PDF

63.6 KB Created: 2021-09-13 07:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 10ed71602bb11547a5505087661ecbb1 SHA-1: 073399769c06ea109d14b524097df7862bec146b SHA-256: 961f08fd695eefa46efa92a77c5e12e310967b80178c6f629b1fc5dadb774726
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm PDF. It contains numerous external URIs pointing to various domains, suggesting an attempt to redirect users to potentially malicious content. The PDF structure and embedded URLs indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6907

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crysiq.ru/uplcv?utm_term=partes+de+un+motor+electrico+pdf
    • http://aokunoil.com/ckfinder/userfiles/files/31778126874.pdf
    • http://sevoir.hu/uploads/file/kojotajufax.pdf
    • http://siamintertrade.com/file_media/file_image/file/73693169014.pdf
    • https://299-45.com/CKEdit/upload/files/goxuzerezikewiva.pdf
    • http://christmaslandint.com/userfiles/33309591775.pdf
    • https://mertlakustika.cz/images/pages/file/61028583085.pdf
    • http://rollfactorytogo.com/uploads/files/82927680998.pdf
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613838c289305---12364660638.pdf
    • http://emilygrilltogo.com/uploads/files/loxid.pdf
    • http://pattarasawat.com/ckfinder/userfiles/files/70805408311.pdf
    • http://mt-filtration.com/uploaded/file/20529436856131440853ec7.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4a0c23231261f8e3750bb1014c9c1b2b/12983423756.pdf
    • http://simkoongschool.com/uploads/editer/files/47549291518.pdf
    • https://viboot.traigiongthuha.com/ckfinder/userfiles/files/sujavufavovotisozavan.pdf
    • http://rajasthanmetals.com/userfiles/file/76650066530.pdf
    • http://kurier48.pl/files/userfiles/file/nogajafazinubufedo.pdf
    • http://ranch.pl/files/file/bivarabafetomer.pdf
    • http://onestep-tokyo.com/userfiles/file/xuwinasisagaporenejase.pdf
    • http://cheers-gifts.com/userfiles/ninefukani.pdf
    • https://vinacoma3.vn/userfiles/file/jobuvinuruja.pdf
    • http://rzn-house.ru/upload/file/kisobilidokoturokepifu.pdf
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/tigonuwidalumitavuzakuf.pdf
    • https://dildendilecevirievi.com/upload/ckfinder/files/togobun.pdf
    • http://ytovietnam.net/ckfinder/userfiles/files/18839660986.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b874.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB874 16792 bytes
font_01_sfnt_off0000d086.bin
07e09929d4f69068922d72f6888db19a06a8d6acef9bcbf49b772089e9f98b52
pdf-font-stream PDF embedded font (sfnt) at offset 0xD086 16600 bytes