Malicious PDF — malware analysis report

Static analysis result for SHA-256 c60e600a520f779d…

MALICIOUS

PDF

76.7 KB Created: 2021-07-13 12:42:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 5025f7044093633e7c9ca14661d463ff SHA-1: 39dc552b387508820a7523126d2be8c10a2f892c SHA-256: c60e600a520f779ddfbc56d56e017f629692fc565bd7788d049645b54526d5e0
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan. Heuristics indicate it contains a link farm pointing to compromised WordPress upload storage and disposable hosting, consistent with phishing lures. The document body, though heavily obfuscated, suggests a callback or invoice-related pretext to encourage user interaction with the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16082eecc7ecb0---24202270281.pdf In PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/ff3b5a7f201732733c2195a4ffd57ef2/luxebujixed.pdfIn PDF document text
    • http://www.monts.sk/upload_images/file/45852193348.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/vivizobevu.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/a9auah505ugvib9nrlkhtcqna8/faxazekamurifafegit.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf0e40128f---39609572369.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/23012954272.pdfIn PDF document text
    • http://klpa.net/userData/board/file/dokimi.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/desafuwizimobibowi.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a0765052f81---81616172588.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/db1b85a837f7af2c708722cb73bd8743/32540171063.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db623aa8607.pdfIn PDF document text
    • https://austdoorcaocap.com/upload/files/tidalazibaxazuzakikogajop.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/orren7j0o4b73ho5i9ucmtviog/50666555410.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/44407328556.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e8d24446337---fatomodefabijisaki.pdfIn PDF document text
    • https://limpiezasinasel.com/userfiles/files/xudewulevovavugagulus.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607014c1e8751---59345427755.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/bhhqodgtn40agj1qvfaqmhnokp/52412625974.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b40e5655936---63204817729.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/85c767b070ef5762557b13103d5595d3/40240180453.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/jaliki.pdfIn PDF document text
    • http://klpa.net/userData/board/file/mawitotisulaf.pdfIn PDF document text
    • http://morebricks.com/ckfinder/userfiles/files/lixaxapi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=alliance+obstetrics+and+gynecologyPDF 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_off0000c9c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C2 10780 bytes
SHA-256: fb8a80dbd0cc399373691346f1a887f2d6d69550c72cbbfcf92c6e921d58df92
font_01_sfnt_off0000e284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE284 16528 bytes
SHA-256: 0620d25779e9a192e5fc46fbe96d25a8332afaac7fba8f3e828b208df52e194e
font_02_sfnt_off00010d6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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