Malicious PDF — malware analysis report

Static analysis result for SHA-256 055e26299555df3d…

MALICIOUS

PDF

83.9 KB Created: 2021-07-01 20:07:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 6b815f2c95ee4240b386efd0befa97e6 SHA-1: e5a0ceda8bc1e6c30cc4b7dbd7dbd9fa5332a9de SHA-256: 055e26299555df3d875ac7ecacd0fa1b4203e2483f6802678bdc15a3fe586845
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to a link farm hosted on compromised websites and disposable domains, suggesting a phishing or malware distribution scheme. No scripts were extracted, but the overall structure and URL patterns are indicative of a malicious document designed to lure users to external sites.

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://krisoc.ru/uplcv?utm_term=what+order+does+divergent+series+go PDF link annotation
    • https://telewebmarketing.com/FCKeditor/file/65441559387.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/holvci8b51itqn3lu2uulcipbp/xobijev.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b75f3b88246---limojojufipog.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a69cc3b93---zukisumozerorazimofevozi.pdfIn PDF document text
    • https://immobilgold.com/file/39450413197.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071bbac9281a---jesifevubuwawu.pdfIn PDF document text
    • http://sity-luxe.ru/userfiles/file/37446023702.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/68563590356.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/gowesotapijinumapadaxem.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/83a951a1303daacd60fd959075b5ca66/82245824214.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/vilinekex.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/oqud72e3s2g5hi2unhe3jnj9d3/73772129608.pdfIn PDF document text
    • http://secohthailand.com/file_media/file_image/file/1838074065.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8d073d33c---8441844128.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/593a6628292a7b1d2c5b695c2da6ca56/13781854474.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/bede4c98dfa60bd8497ff6cc80dba298/kukagumudosimawogate.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/tideperepajade.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a33f16bd719---33155288965.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/bogemawixozove.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/9881952230.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_off0000e6a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000febc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBC 10540 bytes
SHA-256: 7f13c3510cb0c2683a1d5123b23cb4e7537be312880ea874cf8a45a9d7816043
font_02_sfnt_off0001168c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1168C 16872 bytes
SHA-256: 39fdc9f92ab6ee5aad08f22afd7cce474193e427624aca1044dfac6154575059

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