Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0c1877470b40091…

MALICIOUS

PDF

105.8 KB Created: 2021-09-02 00:05:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d10b84abab6b60c1fade1c5d342e453c SHA-1: edc1cab4c89c37e0f5f3d142b938966622a88e29 SHA-256: f0c1877470b4009104b7088ad790667f66653b7172bd2609d9ce3f6bb3e64d87
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the presence of numerous external URIs and the overall structure indicate a phishing or redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://crysiq.ru/uplcv?utm_term=watch+willy+wonka+and+the+chocolate+factory+1971 PDF link annotation
    • https://kede.org/userfiles/file/mozasok.pdfIn PDF document text
    • http://marcelponjee.nl/ponjeefiles/file/39237944722.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/senelobaw.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/zowizevipapobotaj.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c09ff035c---pisimuwoguvelusopa.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/91659591561.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/8e8c0ed2b41804ecbcb7f1604a0c074e/63286932457.pdfIn PDF document text
    • https://nedimgame.net/calisma2/files/uploads/wafemojig.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f8fdc0e87---34013345271.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ad7a164f7a5---lewujosuf.pdfIn PDF document text
    • https://badoza.net/userfiles/file/42260041242.pdfIn PDF document text
    • http://cokhilegia.com/upload/files/migizedediboduzasame.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607106517966e---fowuzixidopolebawivewadi.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/9322ba9f9e1cdfce3e757c7f4b9483bf/xalukokomipeletakoporujin.pdfIn PDF document text
    • http://kaithompson.com/userfiles/file/43572924040.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a7828afa6---92982897359.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612f88b1d5560---64821970676.pdfIn PDF document text
    • http://solmoda.it/userfiles/files/78627264443.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/dojoweju.pdfIn PDF document text
    • https://coonvalleycc.com/userfiles/file/6760128383.pdfIn PDF document text
    • http://conroeclassof72.com/clients/d/de/de0acc14889d5d69ce6a2e221f3e79cd/File/fubabajukukewus.pdfIn PDF document text
    • http://dongduong.net/Images_upload/files/29630290224.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_off00013311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13311 10960 bytes
SHA-256: 98c19a1c76b6f446522c3f66a5a55532380aa56c72e3d0bc24879d07f21b78b2
font_01_sfnt_off00014c9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C9F 19620 bytes
SHA-256: 6f9e7c72bfed30c9de385a7f78388e7c4e6fc0bdca6aa4d70130d250f63343b4
font_02_sfnt_off0001803f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1803F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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