Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e92c4b73c68f440…

MALICIOUS

PDF

54.6 KB Created: 2021-09-24 09:06:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6f2c6fad156743b816cca2a97b4e56f3 SHA-1: bc382544b038e88becdc5fb76915c4dd67c52388 SHA-256: 9e92c4b73c68f440c491f12bd6e3777ca8ea264f9ae63c2446c9858611cc0a03
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on compromised CMS upload directories or disposable hosting, suggesting a phishing or spamming operation. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to generate traffic via search engines using terms like 'pokemon black and white free download for android'. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6444

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://nomylo.ru/uplcv?utm_term=pokemon+black+and+white+free+download+for+android
    • http://www.alexgis.com/siteuploads/editorimg/file/sifomeluwiduzokiv.pdf
    • https://mimpi1pusat.com/contents/files/53357016725.pdf
    • https://kotypsy.pl/ckfinder/userfiles/files/seditosofilal.pdf
    • http://seoulmenu.com/uploads/files/fipopowolaxovetumexexuzin.pdf
    • https://pypconsultores.mx/userfiles/file/5426816538.pdf
    • http://asfalon.com/__files/file/82416498733.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138b96f2a47a---figijezukujavuxiduvak.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161486d717c6c9---66931428293.pdf
    • http://lixupeng.com/uploads/files/dawus.pdf
    • http://debrecen.varosom.hu/userfiles/files/79951020357.pdf
    • http://cartopack.be/Images/file/72309421514.pdf
    • http://oasis-inwaste.asia/files/file/55153771973.pdf
    • http://heatherjansch.com/ckfinder/userfiles/files/85125848766.pdf
    • http://onlinecommerce.bg/uploads/pages/files/89326849454.pdf
    • https://spheresignal.com/app/webroot/userfiles/files/nuvusamakijevevafutozime.pdf
    • http://www.badischer-kunstverein.de/ckfinder/userfiles/files/91388494587.pdf
    • https://tcremich.lu/files/files/71852645570.pdf
    • https://optimustelecoms.com/ckfinder/userfiles/files/57840967941.pdf
    • http://z-i-f.ru/userfiles/file/vidipe.pdf
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/kivipupilovamefalesodizo.pdf
    • http://ajtoablakcentrum.com/_user/file/xuzuxiwuporov.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613f8f18697c3---bonezipip.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/ca05453b1bb544a29a131e5b6a552845/wumusawizigomixedefan.pdf
    • https://www.ojchamber.com/ckfinder/userfiles/files/dinateri.pdf
    • http://mos-craciun-inchiriere.ro/fckfiles/file/5288474303.pdf
    • http://simonkuehner.de/gfx/userfiles/files/porufepigolubemodaf.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_off0000c467.bin
7d694bf15426d6daa19206754d52dd03682cd9c649c36272f38525885bd34e0c
pdf-font-stream PDF embedded font (sfnt) at offset 0xC467 10892 bytes