Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b0ace2293c3f22a…

MALICIOUS

PDF

86.4 KB Created: 2021-06-28 10:20:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 531d864b0ce1ae07c2845d01fef35a28 SHA-1: 491f3921ad691519f57072843f6aa8cead056542 SHA-256: 2b0ace2293c3f22a94544640412016048e9bb5f1f0afa31c6e947ec35acf67c1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress sites and other domains, likely serving as a distribution point for phishing or malware. The presence of external URIs and link farm characteristics strongly suggests a malicious purpose.

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 https://krisoc.ru/uplcv?utm_term=watch+hobbs+and+shaw+online+free+no+sign+up
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/45b94dea5ff05f772ca4a4d29fb5f540/23503986020.pdf
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/6a7240b4c65e3fd7b0e29017d24a6e40/54373267483.pdf
    • https://childconcern.in/trila/userfiles/file/14984873962.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e74f83f88---87033889453.pdf
    • http://reicar.dk/userfiles/file/22579238695.pdf
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16083a4b0764c4---palajitexekimel.pdf
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/b94430752798cb0e9b3807799ec79ebe/8219231765.pdf
    • http://eko-inwest.eu/upload/file/30156189535.pdf
    • http://51-lq.com/userfiles/file///rinaronofelevatipinubi.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/0373fcb318f77b63cc75092ab7db0857/56281867762.pdf
    • http://anhuifan.com/upload_fck/file/2021-5-7/20210507060524578742.pdf
    • https://tractorpulling-emmeloord.nl/upload/file/12321587578.pdf
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/4db3cd664007892f77b9000b46441f44/rusim.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb010cfc41---86550316801.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/t3bpd4c9d3n03i2sbes395b860/17371613578.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5366e691f9---paxifas.pdf
    • http://dorisemitchell.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nafogakorudabula.pdf
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c0563ce1cc1---muviziwezivitobojujo.pdf
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/8428228fdb579256ad0d2a4e73651bcc/ninugulirirexojuxanatu.pdf
    • http://sammyuriasproperties.com/userfiles/files/77614985096.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/6nv73qchvck60jrd5hsmf4v746/lalabikatalom.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a607f5ce529---98405138356.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609eba734330f---zekijofimidepowamumoba.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_off0000e95d.bin
c0f54cdd899e0503c8cdf43ab65f40ed186ed18bd2d903ac6326409805ce101d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE95D 11216 bytes
font_01_sfnt_off00010339.bin
e34ca414e60695ad2c5c7f907fea1430583ee1bd3660c3730440f58ce94a2c93
pdf-font-stream PDF embedded font (sfnt) at offset 0x10339 18052 bytes
font_02_sfnt_off00013263.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13263 16792 bytes