Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e4dcde461ca0657…

MALICIOUS

PDF

90.0 KB Created: 2021-08-08 20:53:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9ee34ee31c8e77fb1f8e282d2c9d22e8 SHA-1: 1db08f667f971f5fb20ef881b5d23d8eaf942e03 SHA-256: 7e4dcde461ca0657d50d4dbe0927627663cdff1537f435ef4ea21ebdfa2a9fa9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links to compromised WordPress upload storage and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://wastran.ru/uplcv?utm_term=how+do+i+video+chat+from+iphone+to+android PDF link annotation
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/rb1kbtl07l7b9q87ic3pjmcgpk/woteparuvubapumev.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/23835648494.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/rizaxuxali.pdfIn PDF document text
    • http://beadsandsupplies.com/images/file/dexanomebirutim.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/58141224317.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc8474c679---bezaf.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/5c29d4763d368e713efaae44e6c48aab/revalu.pdfIn PDF document text
    • https://dolupin.com/calisma2/files/uploads/kelonimatapawu.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/1ca6babad291ae4d7ad287197ea27157/jaxepazerevaxujuvuda.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/8d360d8bb6da2669ea1f50e2dfd88024/rebezokire.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a7774c7a200---wevif.pdfIn PDF document text
    • https://vinniescustoms.com/userfiles/files/detosisuxobawaxadaxixej.pdfIn PDF document text
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/43002080595.pdfIn PDF document text
    • https://agape4u.org/userfiles/file/belulufotipegatevu.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077591ed3fa5---kibafedukuwaxidufevix.pdfIn PDF document text
    • http://agrion.org/upload/fichier/14060745635.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b031d2e08a5---48166832627.pdfIn PDF document text
    • http://crabber81reunion.com/clients/b/b6/b60cf3d631ff247311937b5f15bedc89/File/xasuxitumijitokogakemu.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/r5dgoht7va6uahfu4v7bcgj6nb/52733881327.pdfIn PDF document text
    • http://relocationservicesgroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160727b72bcac4---defale.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/69131121934.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/mikulodatixadajivinan.pdfIn PDF document text
    • http://dulichgiahy.com/upload/file/70279282795.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbe566b990---83915082200.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD16 10816 bytes
SHA-256: 60815f9acb1cbf9a5622c1c08ed0edb2a2a47aa5ccbefa9864e1604d29711ebd
font_01_sfnt_off000115d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D2 16768 bytes
SHA-256: 1576965e47eb56c000ddf45233399684c072bf743dfc07ca9d749f70e37df0ad
font_02_sfnt_off00014151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14151 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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