Malicious PDF — malware analysis report

Static analysis result for SHA-256 45f947f2fdb0937d…

MALICIOUS

PDF

80.0 KB Created: 2021-09-05 15:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 6ec0061b263f20d4156d3ae0c018d23c SHA-1: b9365cd433c7d0a667fc0f49953dcc2bf3ed9375 SHA-256: 45f947f2fdb0937d7faedfe099895fad08c321fe58d510d9b668efe31778aba3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded content are heavily obfuscated, but the presence of external links points towards an attempt to redirect the user to malicious content.

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://anmoul.com/userfiles/file/22059489451.pdf In PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/4d0a21fef0720f11e5e329019062b48e/5698005354.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/ajl97sjlhmq358o0brii58h493/82304944029.pdfIn PDF document text
    • http://studiosaletta.it/userfiles/files/nuxifukirisawaril.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/patiduwapowujoxuvuf.pdfIn PDF document text
    • http://askort.pl/Upload/file/gimesijafup.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1fdd5338b1---7479480747.pdfIn PDF document text
    • https://flour.co.uk/ckfinder/userfiles/files/73768043979.pdfIn PDF document text
    • https://proetcontra.hu/userfiles/file/tasavapijulonom.pdfIn PDF document text
    • http://tacchigroup.com/public/thread/risorse/file/wesatexikanekudegomal.pdfIn PDF document text
    • https://chiuman-hk.com/images/file/sumosatuvuzasarura.pdfIn PDF document text
    • http://marmaraisg.com/images_upload/files/vefemuramaxaxobejojobo.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bf62811c642---17403098096.pdfIn PDF document text
    • https://kvkumariajnkvv.org/singhania/downloads/file/gozipa.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4eb8f21a99---76894704181.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/pevazoradoboxodevoxav.pdfIn PDF document text
    • http://ccforum.kr/uploads/file/1629856036.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/e156e67da1f286eaaa62ee0d8dc54a90/98678785344.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df80d4659a7---xolinepadudatijagif.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/338ef2aadbc434d2691855c365972410/tizibiti.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/66698218879.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb391a122d---lowogorozizopexubu.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/lugasoduw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=exide+battery+charger+manual+10900PDF link annotation
    • 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_off0000d071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD071 11312 bytes
SHA-256: b6cd7533ef7814e1c2e977bdc4362b0e3fb25090877af609a309f00ab158bd18
font_01_sfnt_off0000eaad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAD 18132 bytes
SHA-256: 89e1f2f401d3e15b60e848c1a2d0ccc303e1b08e4191a4258963abec729281fb
font_02_sfnt_off00011a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1