Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0362a526f94006a…

MALICIOUS

PDF

88.5 KB Created: 2021-06-27 14:12:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0577e8cbddb9275b9f0e5cb52706c9c0 SHA-1: d6e837b2e703031dc963fe3a60da8ba1c27b1910 SHA-256: c0362a526f94006aed5ae4dbfba50c0007d2096226ba2995e185177853055e48
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to external sites, some of which are hosted on compromised CMS uploads or disposable domains. The primary purpose appears to be directing users to potentially malicious content or phishing pages.

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 http://amadpich.com/userfiles/file/55558390255.pdf
    • http://nuestratierrapremios.com/campannas/file/tesupi.pdf
    • http://driver-jazda.pl/upload/file/36474811540.pdf
    • http://playitdirect.ca/ckfinder/uploadfiles/files/xitoxuvorurizenijije.pdf
    • http://atdawnwelift.com/userfiles/file/88781902381.pdf
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748e0af0383---merukenolifaloz.pdf
    • http://ccforum.kr/uploads/file/1621913108.pdf
    • https://nhachoxebus.com/upload/fck/file/74374605538.pdf
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/e7c3ce8cb8c8b98869a409183612e92a/5471829066.pdf
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/n4e39t4bupmrsqud6u5f88crj3/76829373727.pdf
    • http://donghozibistore.com/luutru/files/kujewipibazapolutusijo.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6dbe0095a---1844576934.pdf
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/b2c0eeb5834ae5b0f99e28b60fe561e9/xexorujofewibelanubiki.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/16090c913a6e22---lituderokewinovi.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b150d4da204---motodefonezuxigaf.pdf
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/ntdt5mok57nh0b90l1dd7apd3p/fekomunibuk.pdf
    • http://travelshops.pl/userfiles/file/fiwalawotazijafamexed.pdf
    • https://sieuthimaytinhcu.vn/upload/files/69995959988.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bca3df6bbc5---nitosogavere.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/b56f001c22eb5c571b85a1d948f6a917/70485319955.pdf
    • http://barbusci.it/maisUserFile/file/fizirogaxisinomujujora.pdf
    • https://abhimaninteriors.com/ckfinder/userfiles/files/kedapoxu.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9375c8ff1---vukageredudazofek.pdf
    • http://thecobbfr.com/clients/4/43/4363d5a08aa72aedcf7f7d4dd0675897/File/gugedevumetu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=queen+of+puddings
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5ca.bin
faa0f55f91a3e30bcffc888ba825e5ab0bdb2b26f0812bd013bfc288dba41d29
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CA 10424 bytes
font_01_sfnt_off00010d5c.bin
8a272fc0654118a0b3f825ab439766d07cd47c2d9ca88be10d6a05b64f800339
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5C 18608 bytes
font_02_sfnt_off00013cf6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13CF6 16792 bytes