Malicious PDF — malware analysis report

Static analysis result for SHA-256 86003a93fd8bb5a4…

MALICIOUS

PDF

75.4 KB Created: 2021-09-15 18:33:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6e0708245afdbee6ea8bef5a65b272c9 SHA-1: 0c7203300d617cef06b1bd0782150fea571d6fc2 SHA-256: 86003a93fd8bb5a4e1ce140a688e82e43117b29b72158718306fef88631b1cc1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://synerhu.ru/uplcv?utm_term=convert+website+language+to+english PDF link annotation
    • http://xn--2e0b95unoa536adofm5h.com/userfiles/file/76969594804.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/161392a8337373---vitokexalujiberamazajux.pdfIn PDF document text
    • http://opuspointpartners.com/ckfinder/userfiles/files/51528777680.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/tadewilomotuxorulifa.pdfIn PDF document text
    • http://mariautonoleggiomarsala.it/userfiles/files/fuwuti.pdfIn PDF document text
    • http://ecohouse-lab.com/userfiles/file/lumevetarewefiwepudatixu.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614184627fba2---noxalonosibidesozid.pdfIn PDF document text
    • http://abbwingslynnhaven.com/uploads/files/joboramera.pdfIn PDF document text
    • https://philly.drinkpoint.com/uploads/files/gixoredifofijuvebez.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/1ccbd5f470d5d5caf01b34e0b5e07932/lonabexadipawaju.pdfIn PDF document text
    • https://epagneuls-bretons.fr/caningest/images/file/68563502429.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/9db313efa6572faf9af33e834dcdc6db/gatewanideta.pdfIn PDF document text
    • http://sanarina-coaching.de/ckfinder/userfiles/files/sebumakidaji.pdfIn PDF document text
    • http://camonetinternational.com/files/file/39274540929.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc57f0640a---69497055442.pdfIn PDF document text
    • http://stlnsk.ru/uploads/file/19472651588.pdfIn PDF document text
    • http://richardchong.com/userfiles/files/teludekegekomepenolosep.pdfIn PDF document text
    • https://attack.lt/images/files/rokopepusalavopiwibab.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141edd2a39e6---magojupuzokuzolozivovesi.pdfIn PDF document text
    • https://chaletsuenodesol.de/files/mevajojojikasafigajowuf.pdfIn PDF document text
    • http://themadthinker.com/temp/vinney/HTML/userfiles/file/tilinesuk.pdfIn PDF document text
    • http://grafosaleservice.cz/images/fck_editor/file/bevinajinenufitalij.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/63588153377.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/b8c65f85d6c7bd148e4ba6d6bc25017a/90202646301.pdfIn PDF document text
    • http://teamtrinity.net/trinitya/file/56718539145.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_off0000c1c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1C1 17280 bytes
SHA-256: b70c1a3856b70f6b76710654aaeace9523d4ef5b3aee9fc2db1f7f9643bddef2
font_01_sfnt_off0000eebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000106d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D3 10812 bytes
SHA-256: 015f9c61dbc483dcea89a944eb5a67d144a54f84a8eaa86577fb11d5b8746133