Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ce72060abb4da88…

MALICIOUS

PDF

99.4 KB Created: 2021-07-04 06:11:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: faade26d32f6b724c85c1c8f5e13fb71 SHA-1: 2d5187dc266c8a30928460627a917ff2278be630 SHA-256: 8ce72060abb4da889943c2bb84da77028899210b82411362ccb66d20111f6b7f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous external URIs and links to compromised CMS upload storage, suggesting it is part of a link farm designed to redirect users to malicious sites. The presence of embedded JavaScript, though not fully detailed here, further supports its role as a malicious document, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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.
  • 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=write+a+direct+variation+equation+that+relates+x+and+y+calculator
    • https://portugaliaimagyarok.com/ckfinder/userfiles/files/25325241749.pdf
    • http://auapp.ch/userfiles/files/65588046281.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/02476be2cf4da4355253bbd1b7afc74d/7068938464.pdf
    • https://hpsoft.shop/upload/files/tojaridoxa.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/c48605a57f409dd44af3eff27e31942a/93233794689.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4be32c32b---36062374003.pdf
    • http://capmar.eu/userfiles/file/35460165165.pdf
    • http://malbreil.com/userfiles/file/87079967497.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608355cf2e14a---83472966873.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c24b976a25a---nisigirimatowe.pdf
    • http://tencanpowder.com/d/files/77594804308.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b451b0ead07---4737511615.pdf
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/93d227e95749b7cbeec4a2217070d5e9/xovuwikelelidijuvanumub.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608a81e9e5939---zulorerovog.pdf
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/f1df722422958cc9c14f9ecb312bb2d9/pojejemiveletebudepu.pdf
    • https://samowar.ch/upload/file/91358566190.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af481b32db7---72785759698.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b54b2a61d6---94203858377.pdf
    • http://canxetaianhduc.com/images/file/96382961136.pdf
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/cefae1d259ebb68bd79b4cfce7da082e/3786247077.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607358df738bb---290054827.pdf
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/19d55f21300266047905d17b19b1df47/56096582073.pdf
    • https://oklogistic.lv/upload/file/butulurumupu.pdf
    • http://oasis-inwaste.asia/files/file/73920611630.pdf
    • https://strechybenesov.cz/content/gogoxorezobonuwugodaveb.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_off00011fa6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA6 16792 bytes
font_01_sfnt_off000137bd.bin
5b462653ca17f72fe871eb40de5d9ae8b0ae076b715837b1363e5f6516677613
pdf-font-stream PDF embedded font (sfnt) at offset 0x137BD 10988 bytes
font_02_sfnt_off0001510a.bin
9f6d6316a73a7d8cb23f3b3029b283d273d1e699abaf027180a8ce8bba085597
pdf-font-stream PDF embedded font (sfnt) at offset 0x1510A 18252 bytes