Malicious PDF — malware analysis report

Static analysis result for SHA-256 eedb2178caf5c833…

MALICIOUS

PDF

85.0 KB Created: 2021-06-28 19:37:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5cc06a0e40e6d1f2ccc5d905f9502644 SHA-1: a29632568eabe88a1ecafd85d6287b1d236f4ff6 SHA-256: eedb2178caf5c833d5ecef3ba57b3a63f12a4e47ffff9993b7814e7c972ceca3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious or phishing content. The presence of embedded URLs and the nature of the link farm heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://huntic.ru/uplcv?utm_term=how+to+scan+multiple+pages+at+once
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc57c35142---rigovisagesa.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608dbefe6bb3c---dusexidejeketimavaja.pdf
    • http://cezanart.com/userfiles/file/lidipap.pdf
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160806dfc2916e---47289152303.pdf
    • http://unnatiwelfareorganization.com/ckfinder/userfiles/files/89716285832.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4ca882a748---lulub.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2ea7cf2df---18959992963.pdf
    • http://tmtechvn.com/webroot/img/files/babakonivavuzuza.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5de982173---fitoxatimokakovexelitaf.pdf
    • http://southeastern61.com/clients/0/07/0748cf78e2268043913ae7c14e09e996/File/27325722780.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/a1bbe58fed60eb0d3496d437435c7e6b/16486811585.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607018cdd8d16---biwitakexijedadegamuw.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071bbac9281a---jesifevubuwawu.pdf
    • http://kistours.hu/userfiles/file/31946591998.pdf
    • https://sproname.com/files/userfiles/files/63526112122.pdf
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947cdc9d82d---78138601454.pdf
    • https://ajur.rest/uploads/userfiles/file/26774759704.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_off0000ea08.bin
eaf38de9bf527bb1f92daa0e854832ab76e7634407a647cdd973dd588cdac8ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA08 16900 bytes
font_01_sfnt_off00011609.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11609 16792 bytes
font_02_sfnt_off00012e20.bin
fc17c7a249a0fa9c6363a54c4c04d92773f52bf08b12bacda2e369ce28f94382		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E20 10792 bytes

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