Malicious PDF — malware analysis report

Static analysis result for SHA-256 662be019dbe510e5…

MALICIOUS

PDF

87.1 KB Created: 2021-06-28 18:18:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3c97c64bc685759441eebc984b35c48c SHA-1: ccb00e403c971575ae72164b711cd9f65c8e4381 SHA-256: 662be019dbe510e59a6da3e9b16a3499d576df2a8ad69cca7955a5e0425095e7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload storage and other disposable hosting. The primary purpose appears to be redirecting users to external sites, likely for phishing or malware distribution.

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://mfcwestenkwartier.nl/beta/userfiles/file/50913432148.pdf In PDF document text
    • http://www.tomasjelinek.com/img/pub/file/16586643703.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/8740528805.pdfIn PDF document text
    • http://ourjamesfamilyhistory.com/clients/1/14/146a9f92d0a296c7c29e793db058bb30/File/gumepo.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16080ba0594b2a---80428802179.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8125535bd4---sazobovopel.pdfIn PDF document text
    • http://webinaris.net/ckfinder/userfiles/publics/files/62134017097.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/eb24eet7bsd19ttthbafiqr7a1/vazuwitapipedufibi.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/54780707086.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/lru4ou2vsg5ub4clp5841fqf01/23332225195.pdfIn PDF document text
    • https://synersys.fr/contenu/file/xozirawumez.pdfIn PDF document text
    • https://fruzsiflame.hu/userfiles/file/57804216498.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7992aa821---70730925723.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/4962129f98e7db4011ad4aa4eff0b1c4/20353897233.pdfIn PDF document text
    • http://adbuffalony.com/uploads/files/73418518633.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/rawujigafema.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/e38f9e7bdffaf072fa17a8163f2a06d7/fafem.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16087a918c5dfb---3610816279.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/ff19fa52d4ebc4aa43f948f1db97dfb8/benowurozedujupiteridum.pdfIn PDF document text
    • http://ibb-online.ru/f/file/xusagisesomegaripusijogi.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d9ea2c004---vopamonunejunid.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/76594657517.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/e5da76107a89870b0f88509a4baf7b4a/94907680110.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=living+room+coloring+pagePDF link annotation
    • 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_off0000f286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF286 10472 bytes
SHA-256: 0f810cdb5a11bce95c37c0e207e376f97b7be3f547ba2dbafe2bcc053045833e
font_01_sfnt_off00010a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A44 16764 bytes
SHA-256: ee7801aa5909467d1a16306f3b0b8cac2f93fe19425de22b119040e106bc0682
font_02_sfnt_off00013596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13596 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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