Malicious PDF — malware analysis report

Static analysis result for SHA-256 e100e4e8312a37ca…

MALICIOUS

PDF

69.2 KB Created: 2021-09-27 09:49:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 337096a11b01fb07a103b2609f350b82 SHA-1: 726e376b176b3e44a677769dad95a7a5510ce869 SHA-256: e100e4e8312a37ca188403a7cf500d66ae65d83c0b5ff56c7d9c8136f1033901
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised WordPress sites or disposable hosting. One notable URL, 'https://garglob.ru/uplcv?utm_term=download+death+incoming', suggests a malicious intent to redirect the user. The ClamAV detection and ML classifier strongly indicate malicious content, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://garglob.ru/uplcv?utm_term=download+death+incoming
    • https://sssmri.com/ckfinder/userfiles/files/fevilokebawovupuvudezexe.pdf
    • https://sreekanakananda.com/ckfinder/userfiles/files/41098441726.pdf
    • https://tectrongim.com/uploads/files/50826241173.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148e243b8879---gemalorabemiponuzovaxake.pdf
    • https://marljivo.hr/UserFiles/files/94655440369.pdf
    • http://xn--80aatg4aaaddkhfhbf3evf.xn--p1ai/ckfinder/userfiles/files/xafunakowemib.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f4800dac5f---27831422935.pdf
    • http://palmdale.thepokeluau.com/uploads/files/bududagadadaxu.pdf
    • https://piphoto.tw/uploads/files/202109150309108865.pdf
    • http://www.cottagegrad.ru/files/file/vigilupeli.pdf
    • http://tndgdemo2.com/ckfinder/userfiles/files/tofufex.pdf
    • http://orthocarecentroortopedico.it/userfiles/files/35234919795.pdf
    • https://imagebrandstudio.com/userfiles/file/66310520327.pdf
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/94045352910.pdf
    • http://karate-talence.com/newsite/userfiles/files/87338020850.pdf
    • http://peaceinsrilanka.lk/ckfinder/userfiles/files/89344611459.pdf
    • http://avatars.ru/userfiles/file/kivusanidipebixunoziluwul.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614c8f30723e5---wadalakukijo.pdf
    • https://ev-owners.jp/userfiles/files/sezibat.pdf
    • http://soepcentrale-dekeyser.be/userfiles/file/fuzogelijujatiwaxot.pdf
    • http://drukarnia-warszawa.pl/pliki/file/98819501405.pdf
    • http://www.thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/61496369452.pdf
    • https://angkaganjil.com/contents/files/4639808501.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aedf.bin
e8e9a789502115974559c57d489f018c2d43d52af19747fcfac1c73a022bf621
pdf-font-stream PDF embedded font (sfnt) at offset 0xAEDF 10636 bytes
font_01_sfnt_off0000c6d2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D2 16792 bytes
font_02_sfnt_off0000dee4.bin
98f067dfcf84d290fc538ea77bea88f6a6731edc35e81d313aa57ccb099cf08a
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE4 15920 bytes