Malicious PDF — malware analysis report

Static analysis result for SHA-256 215af228ec278849…

MALICIOUS

PDF

89.2 KB Created: 2021-07-06 13:46:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cac4beead43c33c6971116433a263055 SHA-1: 6182677f85945d9e226cb21095bebe7f124c135e SHA-256: 215af228ec2788499962cbc42459173e54e905d41734a67db7784aa65afacdf7
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple external websites, with several links pointing to compromised WordPress upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://aite-materials.com/upfiles/file/bipirevuzanonemotem.pdf
    • http://eksan-ltd.com/userfiles/file/50277170513.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/113ba45d5c06d77dd94c524027fbe4af/46613604243.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/3ab1a8e4fc2b7f8f4817b6eb6e01645d/rivisoxireruxije.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b87ceda2ec6---najalumi.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/72f4fcacfe7f10d009fd28083e8117d5/taxilifadusovofire.pdf
    • http://agataklimowska.pl/userfiles/file/zakonirujesik.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b803cb9d4---jezoranadipefakofapu.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160aec99053474---dakekovejew.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160acd6a61192e---45872403608.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/f2k6dae01qitd4vh323stg5dmj/66552790870.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c14dbd1e3fe---moruzejufusiposafoxan.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092167b6e12c---durewedi.pdf
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/be0e1ca3c0a49d4079c6d39131ada114/65997559650.pdf
    • http://roland-toys.eu/userfiles/file/delunawokuse.pdf
    • http://ktcz.eu/files/files/49755794818.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160cf20a73d589---6069626136.pdf
    • http://vieclamquantri.net/upload/files/32594664410.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/6e574fdb38fde81ff9b93470d53ebf23/29569233346.pdf
    • http://samrayburnclassof1980reunion.com/clients/873185/File/4244397037.pdf
    • http://angelojrobles.com/admin_initial_test/userfiles/file/79390887581.pdf
    • https://sport-jicin.cz/dokumenty/ledeviw.pdf
    • http://mtcongnghiepxanh.com/upload/fckimagesfile/27309598536.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/80913141f08325dcad9dd4f3d5393177/maxevovujar.pdf
    • http://iphonedown.com/ckfinder/userfiles/files/66040747067.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=things+about+sedimentary+rocks
    • 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_off0000f98e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF98E 16792 bytes
font_01_sfnt_off000111a0.bin
efb8cd1f3be982c6281d1d10cc5337b385a1f4f7c53b624cdf822cb0486f14e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x111A0 17004 bytes
font_02_sfnt_off00013dc6.bin
f83496a984c4b5b5ddc5c2c704d5378741b29413edb837fe58073ee00b8d6339
pdf-font-stream PDF embedded font (sfnt) at offset 0x13DC6 11180 bytes