Malicious PDF — malware analysis report

Static analysis result for SHA-256 a322ddb429f56dc9…

MALICIOUS

PDF

67.9 KB Created: 2021-09-14 11:31:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fe99f94a10e6fe1b353bd59f1eaead87 SHA-1: 4b776a18193ab42225c1fb20e62e19d8df815da2 SHA-256: a322ddb429f56dc97df1256a55b91841db664eff31b5a9ecae8758628ad5d323
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, and it contains embedded JavaScript. The PDF also functions as a link farm, directing users to multiple URLs hosted on potentially compromised websites, which is a common tactic for phishing or distributing further malware. The presence of JavaScript suggests an attempt to execute malicious code upon opening the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9158

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://xtrafitcoaching.com/www/images/files/13233331088.pdf
    • http://computerdoki.hu/user/file/48409160148.pdf
    • http://sobateracota.ro/mm/file/48364088977.pdf
    • http://madmojo.com/fckupload/file/tuzapogoboxodasugotu.pdf
    • http://safetruck.gr/images/file/sonididanapubulafekad.pdf
    • https://mgogs.com/mgfiles/file/komepo.pdf
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/ba02fe93abc7d4b6db016dedeb344f3f/81181966698.pdf
    • http://btsoft.vn/uploads/files/nibugexadomitobuloropon.pdf
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/926ec6fc727904d0cca9fedbc2135f32/42218496732.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613688e0e45a9---41775899695.pdf
    • http://mygotour.com/FileData/ckfinder/files/20210914_F94267DA9436AD4F.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/dc89ed1dd12221da4bb943de7dbe6ea4/jigitugaruzilibikarowi.pdf
    • http://www.hgbehringer.de/img/files/files/84978643707.pdf
    • https://silatur.com/js/ckfinder/userfiles/files/64087352215.pdf
    • http://48bulls.com/js/upload/files/21846291757.pdf
    • http://alfavs.eu/userfiles/file/14519503310.pdf
    • https://fsbulletsandbrass.com/userfiles/files/9830264797.pdf
    • https://bisleriuber.genefied.co/ckfinder/userfiles/files/56972602956.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16138435d04890---raxilokaxawedefep.pdf
    • https://mimpi1pusat.com/contents/files/ledimomutiroxe.pdf
    • http://chonburi33.com/userfiles/file/viwijunefaguwel.pdf
    • http://luisacortesearchitetto.it/userfiles/files/17647789635.pdf
    • http://pattarasawat.com/ckfinder/userfiles/files/kezaxazomazeruxewewep.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=aitraaz+full+movie+streaming
    • 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_off0000d95f.bin
6be1f96f2e8ebc838645c05b3a4247b49ce68a6228ce41e10bbd92c99f2cbbe2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD95F 17936 bytes

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