Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e3a8b58db0fdc2e…

MALICIOUS

PDF

125.1 KB Created: 2021-07-03 06:16:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: ffbb5625583e1fa3264cc1c6c7a9bb5c SHA-1: 303dcabe605ec5b9a1f6a822888e91ca59e23d40 SHA-256: 5e3a8b58db0fdc2e476b4895dc17582cc2bef81fc893b63f16d4f130c4d859fe
216 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML models and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links to external PDF files hosted on compromised websites and disposable domains, suggesting a link farm designed to distribute malicious content or phish for information. The presence of callback phishing lures further indicates an attempt to deceive the user into contacting a fraudulent support line.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • 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://telegid.tv/userfiles/files/makuf.pdf In PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aa725742c42---sedador.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/a832739ba7c22e32a1b9e01fa53b707d/9011134352.pdfIn PDF document text
    • http://robinsonfamilyreunion2021.com/clients/7/77/7769cd5c98d63cfb9738ae2db1c5c42c/File/zigidagisi.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/26384469231.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/5bbca6d51fde4d4b901d2c13ce4d7535/dimizadagekot.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/5a894b8131f7d7fe2bc9d803a85bcb28/2867516550.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/3efa71bfa56cbe914e3bdc4c38e739e0/8045787503.pdfIn PDF document text
    • http://aimecostruzioni.it/userfiles/files/peruwut.pdfIn PDF document text
    • http://www.rpv-drachten.nl/files/file/12332420990.pdfIn PDF document text
    • http://sylvianapoles.com/clients/e/e6/e63d90d46a840f0b3195f531cec11f6e/File/zixomujixuvu.pdfIn PDF document text
    • http://www.alfapilates.pl/upload/file/60433595321.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/aa9d77fc06bba1fb01b649c9e90afe36/sobogekapazizon.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/823dc4650dfa7ce7edf4aa301706a8de/93543414440.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/14d568d2352e10ace72546fd8179c35b/zusedimiganidanu.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c02667c91---72249400256.pdfIn PDF document text
    • http://slhs1958.com/clients/18590/File/zojek.pdfIn PDF document text
    • http://cementfeet.com/userfiles/file/42725435368.pdfIn PDF document text
    • http://fashioneducation.ru/userfiles/file/mozawurul.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/83333506005.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=online+blood+donation+system+project+reportPDF 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_off00018534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18534 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00019d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D46 18376 bytes
SHA-256: 37d3107f9c76b2f944d5e0c15ed39b11f3c4b1c784613f61b9f6bd9cd35f9e39
font_02_sfnt_off0001ccf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CCF7 11084 bytes
SHA-256: 44fac3c1adfc7a8c71649c78d8fc93cf97a35a64b0c554d8086c7efe876e8790