Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbc4d7c722ee0f60…

MALICIOUS

PDF

85.5 KB Created: 2021-07-13 23:24:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0b07798042063ce0501095288ce6936d SHA-1: 416cb7245967c8ab7018f10b99541c36bd1f3f34 SHA-256: fbc4d7c722ee0f600ed8b3d8049cb972e59e769cc4882bedb5efa788337124a0
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to potentially compromised websites or disposable hosting, suggesting a phishing or malware distribution scheme. The 'SE_INVOICE_LURE' heuristic indicates the document's content is designed to trick the user into interacting with these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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 http://eia-edu.com/userfiles/file/xobetidulelulevasaronot.pdf In PDF document text
    • http://ventilatoryzlin.cz/images/file/27362476931.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/24908982106.pdfIn PDF document text
    • https://cleanenergy.mn/uploads/files/68973774951.pdfIn PDF document text
    • http://medtravel.lv/images/hand_uploaded/files/dowikegafezi.pdfIn PDF document text
    • https://childconcern.in/trila/userfiles/file/newegalagepijekega.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/15f540a81e5a36d6c87af1a57bf4b69e/46285396833.pdfIn PDF document text
    • https://mps-india.com/userfiles/files/lepodipadidutekumesule.pdfIn PDF document text
    • http://bociany.sk/media/file/jigiluwawaturovoxavifam.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/17ca787d6a3c327eaeccd869d9bbf1c8/fifududubasifutu.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16076bb849345a---40888936466.pdfIn PDF document text
    • http://huefpdf.org/upload/file/18629957074.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-5-25/20210525002712358329.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160d9ac14f2d25---96294218379.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989aaac582b---lozadelokadus.pdfIn PDF document text
    • http://le-bouquet.be/userfiles/files/97659256825.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/novelu.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/golumotutenidarijal.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/75380329584.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607c282b1f8ee---49796965554.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/29865119316.pdfPDF link annotation
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/2eb4790194205b2a399907e5d750be5b/kusiwumenevizatuzevalub.pdfIn PDF document text
    • http://josephfellerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zomiganuregerovip.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070f59aea503---tomewemoropisanowosifumo.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0aa79bfec---75678390604.pdfIn PDF document text
    • https://epiphanych.com/images/file/xoxotamor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=resident+for+tax+purposes+meaningPDF 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_off0000e99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99E 11044 bytes
SHA-256: bb55ef8eb6d4542408f7a94135c25c1787bd73f5e711e570284b439650004f0c
font_01_sfnt_off0001031f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031F 16712 bytes
SHA-256: d85b7fb1d11b381a74e3de5eaf1ab51da72a3ccb8c0859a72d1dff5cc2890b9b
font_02_sfnt_off00012e82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1