Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b00bbca8d15f439…

MALICIOUS

PDF

73.5 KB Created: 2021-09-02 19:03:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ef50b4ee7689f30432c8a5b7db493f7d SHA-1: 561f242a7fff3e2c88bbc7b949d9f351f363ed78 SHA-256: 7b00bbca8d15f4396bf7acc87d79248c5ca46f554f2016107b53cccb751db2f2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress sites and other domains. The primary purpose appears to be directing users to external resources, likely for phishing or malware distribution, rather than delivering content directly within the PDF itself.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/d86a7011276e6d4685d79b0d4ce651e7/gakupudirunuxoja.pdf In PDF document text
    • http://a-swiss.com/upload/userfiles/file/7185960970.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1f2799b49---wiwameforozivugitejo.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6363eca7a---3819283136.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d2b03c0991a---49279747774.pdfIn PDF document text
    • https://maxlinder.com/admin/assets/ckfinder/userfiles/files/kowepogejoju.pdfIn PDF document text
    • http://www.larucheapain.fr/ljk/file/fawivetunokafowadopola.pdfIn PDF document text
    • https://iohrp.org/f_files/files/remaliwevezesovudugojo.pdfIn PDF document text
    • http://glovimex.com/uploads/ckfinder/files/11006209075.pdfIn PDF document text
    • http://majstrissmt.eu/www-data/file/86543923725.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16099c04962c8a---vukelakimafazep.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/b72nfv67ia3136is0g6hoiqeff/sewid.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/wezosovifapomu.pdfIn PDF document text
    • http://st-communications.com/ckfinder/userfiles/files/vejufozojusibex.pdfIn PDF document text
    • https://teamcode.net/upload/files/67502022667.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/eea8909fec18a0908f99e4bb9bf98129/91574805034.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/50bc2f0a22c2b55c30ad1005ff73f528/19295227667.pdfIn PDF document text
    • http://mvpbuilding.com/userfiles/file/66394956859.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/50c9c74602a27f0eeec2291adccd8ef9/sakudot.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/woxana.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/bizodaxepuvidakudagig.pdfIn PDF document text
    • http://hollywoodterrace.org/clients/863344/File/jigudifibowo.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/s4clmqu7s8q33psgkea1np8rjs/pejapimasufozekovove.pdfIn PDF document text
    • http://ndc-group.ru/uploads/files/kozilorasadigoxabelukiwug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=vision+current+affairs+pdf+2018PDF link annotation
    • http://alessandrotria.altervista.org/areap/ckfinder/userfiles/files/xefabasi.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_off0000ba61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD278 11140 bytes
SHA-256: 7142c5073919809c489233cb6acb01830d637bf459bad0a5572857cb2dbcddec
font_02_sfnt_off0000ecb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB9 16340 bytes
SHA-256: b1fc2ec2b4f1726bbb1e42f577ee978dfbe59db45401a9f617984e9010e7500c