Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cb9f89693028281…

MALICIOUS

PDF

87.3 KB Created: 2021-08-01 03:44:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 69d31e52c1220d8710383c8041184704 SHA-1: faf8864e1816773a9a98e92f40e98acd26536aff SHA-256: 6cb9f89693028281381453828507c892e39efb8c2eaec0c34bc7cf66263915a2
156 Risk Score

Malware Insights

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

The PDF document contains a link farm with numerous external URLs, many pointing to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document's structure and numerous links suggest it's designed to lure users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://archism.ru/uplcv?utm_term=write+a+news+report+on+road+accident+you+witnessed
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/09088ffde1981964f5babcc68259a670/mageladotaj.pdf
    • http://yongqingtech.com/d/files/mirujatobobulosotube.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16098374970c19---mulorefuzenowixa.pdf
    • http://saovietgroup.com/upload/FCK/file/pisopikusomag.pdf
    • http://akgikorea.com/file_upload/fck_upfile/file/83568514371.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160967b2ac27a9---fusefifure.pdf
    • http://ffarchitettura.it/userfiles/files/81647234427.pdf
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/dcopvjt2maggs9a2rbl12u98lc/xinamudoleselijit.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16092e1f5e5fb6---gotifuloxilagiweroxe.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/5av69ovhfr58ose7efmtgf7gvs/41744024791.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc0e077a49---xoropopixo.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/les4lphm929knd461l77ojita3/28642248877.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/nd7qhgubqkqefi3fijdk2l1r0k/79473900908.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/ea675a9d4724f231f9a549849d33e813/96234264648.pdf
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/9f78452598988c8b7e9a1f3a719263a1/gudaterowexojem.pdf
    • http://andlupa.com/userfiles/file/22792132474.pdf
    • http://printrun.nl/userfiles/files/pirinewosafekodixaregu.pdf
    • http://swaminarayangm.org/userfiles/file/xaxamopagarorijinow.pdf
    • https://lolakarimova.uz/ckfinder/userfiles/files/42524216093.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/161028afb49acc---72859358600.pdf
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/t5t84coc32gnu1msvoodldpvm2/95158886636.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5960b31cbe---pokodusu.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a7164046953---88147943796.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_off0000f240.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF240 16792 bytes
font_01_sfnt_off00010a57.bin
73a58f43033f863d9027a0fc0c64cbd024e27a608c8b7d50772d3dddb3c27033
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A57 10752 bytes
font_02_sfnt_off00012346.bin
e0db1854850275cab3dda2957cf344d45521f7211c4da379fec69e4fb29869c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x12346 16692 bytes