Malicious PDF — malware analysis report

Static analysis result for SHA-256 93204bee5fc0d6ac…

MALICIOUS

PDF

90.7 KB Created: 2021-07-23 04:51:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9923e346f84c581d295cae7584507d8d SHA-1: c26d3abe63ac8714c7940d33bbfe2ada24b2e104 SHA-256: 93204bee5fc0d6acd16f78ef6359e45515ae9fb86b5d7b5e3b860cc7b7849bbc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many of which point to compromised websites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://inverpalmas.site/aym_image/files/3791847601.pdf
    • http://foodchemsino.com/d/files/80260213103.pdf
    • http://espressobuilders.com/app/webroot/files/userfiles/files/porurafavofilaranasudibaj.pdf
    • https://bloomeng.com/uploads/23284232485.pdf
    • https://warsztatgdynia.pl/app/webroot/media/files/94877017372.pdf
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160762a5d9aa5b---24979127955.pdf
    • http://ildungrice.com/fileupload/fckeditor/file/mojiv.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4cc753891---febud.pdf
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdf0106574a---19206317647.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb7e5453c9---1245085076.pdf
    • http://www.bufolari.com/public/immagini/file/bawavumeroxetile.pdf
    • https://alquimia.in/admin/fckeditor/editorfile/jowetutas.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/6564278c6c177978a0e9ea611466f35f/64722534208.pdf
    • http://amirafouad.com/uploaded_files/file/saxumunozuwuvijunaliga.pdf
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085fc1cda7c1---38261219516.pdf
    • http://clinicaveterinariailmarzocco.it/userfiles/files/69610624363.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5f556933d---lerafulow.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/a7246e3e269a649133befc0448921c31/jonesitigi.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/sqbve1oc29rcbj9dlsdq52a204/15740359940.pdf
    • https://alihuata.com/userfiles/file/kiwutagirovotelewat.pdf
    • http://secretlove.ch/ckfinder/userfiles/files/3894537668.pdf
    • https://stayatrosetta.com/wp-content/plugins/super-forms/uploads/php/files/3omhjuep0okqqig0nsno886ckm/mowolelepisotumajuxubu.pdf
    • http://terhautz.com/upload_files/files/20046357160.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607581bf15c7b---89463214045.pdf
    • https://ludifrance.fr/userfiles/file/soxekizudu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+install+software+in+windows+10+without+admin+rights
    • 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_off0000fb72.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB72 16792 bytes
font_01_sfnt_off00011389.bin
5ce5683f3a8396952f2ca2923aa1594f64346f4427868c5d8e2a03f651363a1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11389 11152 bytes
font_02_sfnt_off00012d3d.bin
41c150f06a8fbfd892776957eced46a27be1ec08171a47b2c0186f165b7e4801
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D3D 17480 bytes