Malicious PDF — malware analysis report

Static analysis result for SHA-256 298218562981a6d3…

MALICIOUS

PDF

99.8 KB Created: 2021-07-07 11:07:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 682a82f5f66fdb899c5452d03e72f410 SHA-1: 0b309d771b6970d1ab73b793ad0def24bff242cb SHA-256: 298218562981a6d3044000016997a771987bb6f54e4f2aed30b25ba830ceb38a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. The document contains numerous links to external websites, many hosted on compromised WordPress sites, indicating it functions as a link farm. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=vapor+compression+refrigeration+cycle+ts+and+ph+diagram PDF link annotation
    • https://advance-pack.com/editor_upload/file/9476207274.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/7d38cc3cf5553656a6c0fd6f6137b59a/98676371978.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160928757cdadb---90312132881.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/8af3e5f413987b8f8e64225898099370/duviwinowuvage.pdfIn PDF document text
    • https://virker-ikke.dk/files/24141676518.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/430e3dca63353540cfa41f91cced4f15/63206469768.pdfIn PDF document text
    • https://biocoils.com/img/file/temowofigafiwoten.pdfIn PDF document text
    • http://trendymamy.pl/userfiles/file/32774733076.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/c99e76f4c96d0edb2d2147077c6bbffc/jorabaj.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/3f629295b29e55b17cc21febcc9679fb/33750211476.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/muruwetoragot.pdfIn PDF document text
    • http://fitsiluet.cz/data/file/80521273210.pdfIn PDF document text
    • https://doublehair.center/upload/ckfinder/files/93525673472.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/damukepofo.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/tivagubiwaveloxodujupit.pdfIn PDF document text
    • http://lavalnerina.it/userfiles/file/25696275553.pdfIn PDF document text
    • http://lacyfamilyunity.com/clients/2/20/203fd950dafdada58ea32e7b96f0d147/File/23880562424.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3a94d57ec---xugivukixunen.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/4c8db24f2399e826adda8c5dd3c825c9/pejarirajofukab.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607075f3bbc0d---22128167855.pdfIn PDF document text
    • http://automozg.by/upload/editor/files/zisida.pdfIn PDF document text
    • http://davidlbrooks.com/clients/868292/File/gelek.pdfIn PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/62692795692.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070036739211---kuduvo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12109 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13920 11152 bytes
SHA-256: 437ce951152d76832350554e240d8d5d8172dd10021add53f9c898d34305e569
font_02_sfnt_off000152d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152D1 17696 bytes
SHA-256: 984944d699b174a0383f91c656d739aac310c19cc22382492ab1b13661f58a66

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