Malicious PDF — malware analysis report

Static analysis result for SHA-256 da85aa326e959e09…

MALICIOUS

PDF

85.7 KB Created: 2021-06-26 03:11:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c217395baba112185c177400384729e1 SHA-1: 17c8d37d1746525fa3f6c3b4f0a153c3f26fa3cd SHA-256: da85aa326e959e09098104d4b1cfbc7228d098367bda8d632e5f29721bdd1096
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The file's structure and the presence of multiple external URIs indicate an attempt to exploit users by directing them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16096f046be94d---9910847316.pdf
    • http://ikhmongol.mn/ckfinder/userfiles/files/44496911964.pdf
    • http://richmediahouse.com/admin/uploads/file/liremozepunadukeda.pdf
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/dc203785987086df2882a86935606047/58220158858.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/ckj67bkpho7ro6ikggul6g5p45/pojawi.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b119e37efca---55542860773.pdf
    • http://accessprecision.com/userfiles/file/xoxevuserexalirilolure.pdf
    • http://womenwhorockarkansas.com/clients/4/4c/4cfcdabbb7b8ad81bafe9a4295858145/File/35495047028.pdf
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/070b0deb5ba60f28f6d525fc0fcb896f/detapakijezonasen.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608059f193b36---noxafimuxakovijig.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070f247b023a---wavesepodorone.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cedae158fb---2705137362.pdf
    • http://mamnonlittlesun.com/upload/files/xoteliwar.pdf
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/mvhf27rlrr0f27uep4q27tg8ej/72151306953.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/8d57a2a7e5148e680f60ac49e23d5069/mopagovuwiloseripomibev.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b330823f93f---37032901462.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f72b5b40c6---rojab.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1606f34667a025---dajulidosaxiriromulo.pdf
    • http://ahlhy.com/uploads/file/080317234110.pdf
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/e6s1p37p1k763aqh56jtle7mod/86532805534.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=four+components+of+psychological+health
    • 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_off0000e901.bin
21933b749c2b70c701fac4c2561ee6780f4ae5d31ace73658fce2984e85b920f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE901 11120 bytes
font_01_sfnt_off000102cb.bin
af7489ab7f865afc12e0f6b12702474c931865c8f5f82679232a3ca013938812
pdf-font-stream PDF embedded font (sfnt) at offset 0x102CB 17224 bytes
font_02_sfnt_off00012ff4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FF4 16792 bytes