Malicious PDF — malware analysis report

Static analysis result for SHA-256 de30c7cc3b5b81d4…

MALICIOUS

PDF

85.6 KB Created: 2021-09-02 04:29:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 366bf6f4f48676e1f35135b2f5010ee3 SHA-1: cbc1e95c265ecd6613ad49350e0f2c15162de24d SHA-256: de30c7cc3b5b81d4767d673383cc084b951f0b4483c22b25c89e869b91a0105f
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. It contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, but the presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a likely attempt to manipulate search results or host phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://infrive.ru/uplcv?utm_term=addicting+games+answers PDF link annotation
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/14509586f79635a0664260d62beabd85/62061550986.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/ad46947d6ccea01eb9f21c4bf6f24ddd/99071130798.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/kozirasowujabafedi.pdfIn PDF document text
    • http://villaelen.it/userfiles/files/92973301742.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160a1691845744---kunaxolelanotut.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/5nh5p4rl0k4c2msb63d12atfi5/tibalijelojamiredenol.pdfIn PDF document text
    • http://sinorarechem.com/upload/files/71420142317.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612374a4e99bc---943363688.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1e2caa74e---19345881110.pdfIn PDF document text
    • http://huefpdf.org/upload/file/80180701836.pdfIn PDF document text
    • http://bakoca.hu/files/file/3921174533.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/ragosunebatozevolazow.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/788b3c70a8aeb11e66499630dfbb3966/verefeve.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/85221623123.pdfIn PDF document text
    • http://biolabsrl.org/userfiles/files/8640698875.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/20717182608.pdfIn PDF document text
    • https://gamedunyasi.com/calisma2/files/uploads/98247137480.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/a9mr9l30ielio4v01j621ibrp4/vepomobovozuja.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/bc60c3a70d1a6d722c6ead1c298b395c/27360602409.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609be1c4484c3---kemikezitulajanaxekesid.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/28aivofafolu1f6asmasf1d7q5/kugimapojigileg.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_off0000ece4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE4 17264 bytes
SHA-256: b17376d584d4eff30018c8cc3bb0f57af9ecafc7058c812b8ad08e6cddb24db9
font_01_sfnt_off00011916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11916 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001312d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1312D 10612 bytes
SHA-256: 53bfe06e5fb78fa608f11b6c9d6a56c6e2e99985a816142d2e9c5e87a559f1b4

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