Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a853f43f0299046…

MALICIOUS

PDF

80.0 KB Created: 2021-09-19 19:50:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6d619c0993d4445765ba7833b7f86d5d SHA-1: 201780123e42bdf5b5e973108b5ad16f03d36256 SHA-256: 6a853f43f029904663ef928277aef2112b615339000b5afc3233969211a582f7
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are structured as a link farm, a common tactic for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure itself likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6001

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://equator-maritime.com/userfiles/file/24893907438.pdf
    • http://duquenne-moteurs.fr/webroot/upload/files/vutararelekaf.pdf
    • https://peptidturkiye.com/ckfinder/userfiles/files/wobegeturarajojopategibiw.pdf
    • http://geyuping.com/geyuping/uploadfile/file/2021091804372973499.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/i5aj1kblqm6l31onu6lsdrprp8/nefewener.pdf
    • http://www.radio-kum.si/data/files/3384522508.pdf
    • http://lifecontinues.ru/images/files/86238178116.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/24fbb51675c908f69839dffdecb71b77/dupubewitedapexawafike.pdf
    • http://miet-boot.ch/images/uploadedimages/file/kugamizirivafaxulu.pdf
    • https://virtrade.gr/userfiles_lybo/file/sidev.pdf
    • http://boathousebrokerage.com/userfiles/file/16360902212.pdf
    • http://poliinc.com/upload/files/kiditufazilefafu.pdf
    • https://propage.q-cloud.net/upload/ckeditor/pages/files/51113027346.pdf
    • http://gaia-onlus.org/userfiles/file/jifube.pdf
    • http://nfrostov.ru/upload/files/nubuxodewebuvabixaja.pdf
    • http://universalestetic.com/userfiles/file/jozudulabawoketifuvanu.pdf
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/javexelonu.pdf
    • http://www.accl-calibration.com/login/ckfinder/userfiles/files/kafonek.pdf
    • https://mystruggle.uk/indigo/ckfinder/userfiles/files/xaxagitizupesadiguvaxun.pdf
    • http://kreativitaet-stadlhofer.at/global/images/userfiles/file/43339902153.pdf
    • http://norilsk.torbay.ru/images/uploads/file/taledulotoreda.pdf
    • https://darshanam.com/ckfinder/userfiles/files/32497496147.pdf
    • https://casalindasbakery.com/ckfinder/userfiles/files/39337447696.pdf
    • https://heks-tech.com/app/webroot/userfiles/files/64497672465.pdf
    • http://swotaweb.com/img/upload/file/tunumel.pdf
    • http://jca-t.com/fck_image/file/wigepedunedo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=guilty+pleasures+laurell+k+hamilton+pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110b4.bin
2bd824944c43f84bf5d27d3079dccf9f76ba40d7cc3f4423d91d67ccd67ebc2e
pdf-font-stream PDF embedded font (sfnt) at offset 0x110B4 18740 bytes