Malicious PDF — malware analysis report

Static analysis result for SHA-256 967871240ea8b33f…

MALICIOUS

PDF

219.6 KB Created: 2021-06-27 16:23:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9c996542a16adabc82aa31c9edae6134 SHA-1: 583e0c3c055624472124e21cd7181673112f58e0 SHA-256: 967871240ea8b33f1397070406c741b34bd530a6bca1dde533d60da6bd102f6b
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV flagging it as a phishing trojan. The sample utilizes a link farm hosted on compromised WordPress sites, directing users to download further malicious content, likely for phishing purposes. The presence of embedded URLs and the nature of the heuristics strongly suggest an attempt to trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9882

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/504b44766d552aa89cf417c3b753860c/78198091924.pdf In PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/79c07f00b5c47884053acd7ac0b4db1a/tefujuligisomubi.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/ganasagutoxodajafe.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e5149e5e8---84873779504.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/436e956c128b77e885683f65c125ee47/bubomavegaburomuwipaju.pdfIn PDF document text
    • http://tdfinalists.ca/clients/43449/File/soxixolusowi.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/17c3c2bfe1499b5b02643a89c6d5680e/xebebotunub.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2bb027756912566f790785c6555039a8/siboredonoxalot.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c93965813---jopojaxerapejesil.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16084ef9acba07---82599392788.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/25594492555.pdfIn PDF document text
    • https://educationindiajournal.org/ckfinder/userfiles/files/76684859806.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160c98f44c0b29---39469996490.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/subhaqg5b4drs87jeh1bdfk8tu/14299879427.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/38993427004.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/tdr3itlfhneq5pku089t29nd19/39835289347.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/72868374182.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc99643aa2---lojurigemaxebelakaj.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/06e8aab3b868e6d17b058335b9249c52/27075944690.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/9c759da3ec6e5cb5bb848fe03d5eb78d/zojibajesitozinuw.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/8607250186a43f5ff4918d4417ae1a0c/laninofozewepekegakot.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/238ef716a42ebbe223b27e698c8313e3/8131544606.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=the+hero+with+a+thousand+faces+summaryPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002e7fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E7FD 1700 bytes
SHA-256: 15171638d69c9281a983de8a04f8d213e5ed86d33053034f6aa0dd130c4010d8
font_01_sfnt_off0002f010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F010 24736 bytes
SHA-256: 462033a2d19a9b7807d4c7217d14de4e143056cab9892bdc3cf972824d03a73b
font_02_sfnt_off00032e3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32E3A 10956 bytes
SHA-256: 39f40f8633049bc68340a0cc3f00fcb14e7bc35bc32f041f75b0a725502e3a2b
font_03_sfnt_off0003479d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3479D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.