Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa848a2eb7d173d7…

MALICIOUS

PDF

143.9 KB Created: 2021-12-14 19:53:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-07
MD5: 4fff63d6049c0786175264540d05cc2c SHA-1: e7b2720debea42879b189df7c3db25c1b55670a3 SHA-256: aa848a2eb7d173d78410e172e7abbb979445bf4698b8c7df9c76461177076c2b
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9766

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://centreforeffectivecoaching.com/media/file/vorigozezu.pdf In PDF document text
    • https://indiansecuritisation.com/ckfinder/userfiles/files/numalofozid.pdfIn PDF document text
    • http://ourdesign.hk/ckfinder/userfiles/files/50433539783.pdfIn PDF document text
    • http://okna-dvere-online.cz/media/upload/upload/file/28799360622.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b10b628ed4---fuvibolumugedumoropomumig.pdfIn PDF document text
    • http://yung-shun.com/userfiles/file/13361210879.pdfIn PDF document text
    • http://trinitysportsandleisure.ie/userfiles/file/88460986886.pdfIn PDF document text
    • http://automag.pl/userfiles/file/23787480013.pdfIn PDF document text
    • https://eliteplacementagency.com/uploads/files/14793178561.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161a6a44708753---88301044533.pdfIn PDF document text
    • http://xn--80aiddhbkcq5bcaz.xn--p1ai/upload/files/jasofip.pdfIn PDF document text
    • https://siriusdynamics.com/assets/uploads/files/gajanibevotuputevifuvevi.pdfIn PDF document text
    • https://littleedupark.com/ckfinder/userfiles/files/ralaxame.pdfIn PDF document text
    • https://pielinks.com/UserFiles/file/litegerekelef.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/dasekexis.pdfIn PDF document text
    • https://hotelgaric.com/upload/datoteke/85008030749.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/85cecec3759ef3cab7e8868f01642dd3/4902854698.pdfIn PDF document text
    • http://meubelenindex.nl/images/uploads/63287696860.pdfIn PDF document text
    • https://eurotig.ro/file/82638910456.pdfIn PDF document text
    • http://ruihuitax.com/files/file/xukerivatonase.pdfIn PDF document text
    • https://palacioquintin.com/upload/editor/file/2472182460.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1615ace4d01a0c---5300326361.pdfIn PDF document text
    • https://hbfilm.ca/resimler/files/jawaruguzime.pdfIn PDF document text
    • http://balie.overeembv-profielen.nl/upload/files/pomibotavajurolovo.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615a826fd1f35---77220327572.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/BGAemAmcdTc/uplcv?utm_term=consejos+escolares+de+participacion+social+coahuilaPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001cf05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CF05 19064 bytes
SHA-256: 1151db5c18e069a962dca7ed1d626a95b4b6e2febd71dcf21a730313b73044e0
font_01_sfnt_off00020002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20002 10872 bytes
SHA-256: d7af2995c938a02dd88cfe60ee4e452b2497754c3d4c3f031d24f76b65bc4950
font_02_sfnt_off00021915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21915 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336