Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ebd3289c62ffb60…

MALICIOUS

PDF

86.8 KB Created: 2021-09-21 06:35:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 67d46b98e862046dea3f38edb031c2ef SHA-1: 2d8a219da4c041ef29feb661e4ab856617e9d710 SHA-256: 7ebd3289c62ffb60891d9fdd6203970443e08ba75f9b3593e26f12d1a1f3adeb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. Heuristics indicate it's part of a link farm, with multiple URLs pointing to disposable hosting or compromised CMS uploads, suggesting an attempt to obscure the final destination. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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
  • 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 http://ncfc.com.tr/ckfinder/userfiles/files/53883553004.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea945bd1ec---19905564645.pdf
    • https://ourlady-schools2.com/userfiles/files/medojid.pdf
    • http://jurabos.nl/include/editor/file/revuwekirozasafigusifux.pdf
    • https://supremeroi.com/FCKeditor/file/pilulud.pdf
    • http://www.heksan.com.pl/file/gegogutovinatejavonabiwof.pdf
    • http://kfoodntea.com/dataroom/file/semupo.pdf
    • https://tfsroanoke.com/home/tfs/public_html/new/ckfinder/userfiles/files/62343388393.pdf
    • http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///mafugudifosetopafexilene.pdf
    • https://aukshanya.promosing.com/alpha/ckfinder/userfiles/files/33889219438.pdf
    • http://showpalmedical.com/userfiles/dupigufab.pdf
    • http://tech-in.info/bramy/userfiles/file/30928404104.pdf
    • http://humidorio.de/ckfinder/userfiles/files/45738811407.pdf
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/21060329988.pdf
    • http://vasvaripalmuzeum.hu/upload/file/latuvekotomajewer.pdf
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/xolibofusop.pdf
    • http://garmaclima.com/uploads/ckfinder/files/77890814940.pdf
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/nipukidomesol.pdf
    • https://frisch.ro/files/file/88815157526.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16132e51894d16---wibuselinumemi.pdf
    • https://newchat.xyz/js/ckfinder/userfiles/files/21565361822.pdf
    • http://www.pacautomarketing.com/file/90391022926.pdf
    • http://yuqiaohome.com/uploads/files/202109171849545827.pdf
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/8af9b4b32dfc6b1c7f7b7d6115b7a9f9/7564902283.pdf
    • https://turdv.ru/SITE/files/editor/file/zatuxunanezajiruw.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=live+cricket+streaming+on+android+mobile+app
    • 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_off0000ee10.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE10 16792 bytes
font_01_sfnt_off00010622.bin
c2a083cc8a875e32ba0000c222bbe47e46f7cbb8dbb67095ee8cfe6f4084bf44
pdf-font-stream PDF embedded font (sfnt) at offset 0x10622 17840 bytes
font_02_sfnt_off000133cc.bin
b1d27e61d43e9cc39375b244b87bbdba7371e45b8dc4761fe78f887023c3f9e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x133CC 11112 bytes