Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1173d9003fbaf13…

MALICIOUS

PDF

97.6 KB Created: 2021-06-26 21:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2724b8f88b7b56b0ddc4295b65cfb93c SHA-1: 60bd45329f9fbac6d4ac6df106f1e003138a821c SHA-256: c1173d9003fbaf13ad3cc9443ae9d061f55f457c94784f3a4c526e38f9d30ca0
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document exhibits characteristics of a phishing or malware distribution lure. It contains numerous links to external sites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting an attempt to obscure the true destination. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely provides password instructions, a common tactic to bypass gateway security for encrypted malicious payloads. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://prestopc.it/upload/file/fudunofupexorigujuko.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16088afdab53d1---fosusopinumurevadoj.pdf
    • http://sshs61.com/clients/6/60/60e739d5a8cf4a6710e4f064fd99417d/File/26064181801.pdf
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/978d6d1716b05453107a0182f3265538/ziloginevimoxanajar.pdf
    • http://jtour.vn/userfiles/file/xusezegapikowo.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/6b3411104a0ddea5079925c95341fa0d/95003404793.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/247olhlqs7n576p2u9ve4i5pk6/29397039596.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/d117f8ecb86328997b61dbd49f72410a/rereguxolilesapejifon.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160964da45793b---wezulopugowotiz.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf263de747---besukapezunutez.pdf
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/b68d25ce7cb1298d6e03758f5b1fe7be/mikedujixivakeno.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/86270b176a5fb1998a532ccdb1ef5ebf/watuliraxizopopezu.pdf
    • http://inlovehuahin.com/file_media/file_image/file/ronupagulebujefutinu.pdf
    • http://caratow.nl/userfiles/file/zikiponisasudeworexala.pdf
    • https://almoheetmanpower.com/public_html/userfiles/file/27642634509.pdf
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/8esjlv1dqonv4o2g33o9dnfqi2/lalodozilulobevak.pdf
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/nasigegijibevimivalika.pdf
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607182eccb32b---23146467950.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/584a971087e27b9ca3823abc304c9470/94303109348.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160acd46a50a98---69819263427.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1606edf6539e67---31013146885.pdf
    • https://aimhc.com/userfiles/file/luzopo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=fifa+18+ppsspp+iso
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010612.bin
451f405a0ced034631dbe1c633f729c7f75ed3ae809f6968d7f413a843910167		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10612 17308 bytes
font_01_sfnt_off00013345.bin
fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13345 16144 bytes
font_02_sfnt_off000148c5.bin
2aedc31c3de825c400ee3d92f3ee6c2428efcadea011ba3be6b2a69c5b3d5dcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x148C5 10108 bytes
font_03_sfnt_off00015f72.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15F72 16792 bytes

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