Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd00cc662cb5285b…

MALICIOUS

PDF

89.1 KB Created: 2021-07-13 04:30:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 696e33e97cb10fc829227f768cdf9e70 SHA-1: 6886fec0fd7268a13c95d2addea8896b172f1281 SHA-256: fd00cc662cb5285b72eb24256d768488ed888b44e35f25db643890dd85fde8cb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which point to compromised WordPress upload directories, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/1ccc346c51d6552f93fd95ee814af041/95950627544.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16085527b15105---xunado.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/s5bbjfb3hlmlmk5k582tlj7g33/65859840669.pdf
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/mfpfbhhv7lhocju9222tnfu5l2/subimuwudebasojebizuf.pdf
    • http://mid-europe-ex.com/images/blog//file/19003169551.pdf
    • https://ayurvedaemart.com/uploads/file/wolenarodudotagut.pdf
    • http://www.truca-taoules.com//ckfinder/userfiles/files/41543925960.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/0b2133d68a0dd9ba93e564c37bc256e4/sajavixi.pdf
    • http://kargo-box.com/uploads/files/39543393559.pdf
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160781d3d9fc19---rixusib.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8afd317183---buzajijetawozopejad.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/22119455a8fe9efaeaf49599b9e30b0f/35867950236.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160817a0fabf17---jifafanamaworolomerogonak.pdf
    • https://blnk.eu/userfiles/files/dexojenotipoxuvowu.pdf
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/57322793617.pdf
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/889aab9da795ceb562b259b0edb25ff8/wivetovalalazetunib.pdf
    • http://shangrilatheshow.com/ckfinder/userfiles/files/55893373799.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607791adc77bb---27362741965.pdf
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//bidebukabezezuwujimid.pdf
    • http://irollee.com/userfiles/file/fezupirufowuboxiparagabon.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b87a3017857---tomoxaf.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/evbmd7k4jqe7ldma0nndt8gtsa/55792479127.pdf
    • http://www.cbs-emballages.com/upload/file/75133044476.pdf
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160dbddd562c3d---mawomoberuzozokekinowulik.pdf
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d8497722bb9---fumajisipafuvekimituke.pdf
    • http://www.haztartasigepszakuzlet.hu/pics/file/82896554385.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=dawn+and+the+impossible+three+read+online
    • 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_off0000f886.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF886 16792 bytes
font_01_sfnt_off0001109d.bin
4d459d42f65f45ab98804f41b2b667e43d0c6f40b2ea8df1055278905ed0887e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1109D 10884 bytes
font_02_sfnt_off00012959.bin
a7a2bfa7a605cd5ffef99439fd804bc78a454861fd87cd14c336ffce721a19ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x12959 17476 bytes