Malicious PDF — malware analysis report

Static analysis result for SHA-256 90d2767507d641cc…

MALICIOUS

PDF

86.0 KB Created: 2021-06-29 21:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 13843f11b472b65b7b503ba6a4b4a341 SHA-1: cf99f48abe32f1d4d4db2581a100b299c80460e6 SHA-256: 90d2767507d641cc14c7a659938c4865c24bba903cd6284df444fe0201c09d80
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ML classifiers and ClamAV. It contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lead users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d7c01823ba3---gefinadazubabugamo.pdf
    • https://adreshosting.com/calisma2/files/uploads/xisazitaxexolipak.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b4095d1b56a---86250984712.pdf
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/5f6cb052338d374cf81b846bc86a5dfb/65577200446.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/2e724906beff99f5bdc2bfb47d5cc226/15247286761.pdf
    • https://autotrans911.com/thread/admin/uploads/file/10240012385.pdf
    • https://cardion.dk/gfx/fckimages/file/58390993244.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af3d8608e43---8506474762.pdf
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ced118383d9---94402710901.pdf
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/jodawojadan.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/vghlshvs542bv1eals3kfu0fm4/rejisakewerebenimatazowow.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c33f26ca8e4---wezinazutinanuw.pdf
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/065eq697a64vec9rh0kvdv2lbc/dusagol.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/hthdvhfshdqk2292umdgfpbbn5/38248226371.pdf
    • https://designclarf.it/file/15705655035.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6df59cee23---timadumosolasivukijegabu.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf5ef34f5a6---53459119081.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf8ff15b48---91462632873.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/nlgi3ak14e99g4r8dti9nqg6h3/retaxalu.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/f462ad010e8c8c92a20620419b432af1/gulinujozamezunorifuvir.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160cef75cd960b---60247377811.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4741cbd9c7---xevovu.pdf
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/a849a057306bb6ae663d8cff62f78c8f/10688423187.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=drinking+pina+coladas+and+getting+caught+in+the+rain
    • 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_off0000eb3f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3F 16792 bytes
font_01_sfnt_off00010356.bin
96e161fac2e339bbfbca32cff1262130a3863535b240dd3f693400453425f308
pdf-font-stream PDF embedded font (sfnt) at offset 0x10356 10984 bytes
font_02_sfnt_off00011c96.bin
24d5cfed459c8f1d24f120b7eb896001c0e399338e908a9931c7e34e46bf6365
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C96 17576 bytes