Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d5e794830a0831…

MALICIOUS

PDF

77.7 KB Created: 2021-06-24 07:23:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: c5ac9e12fb1a2ca3682fd1dc993fd7a9 SHA-1: 5ec4e119244434f8f95be5a82ac58f449c213c4a SHA-256: 47d5e794830a0831989c3dfbfac31ea86e419704185cdff7dbac6f8cc53e0770
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs that point to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to lure victims to external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/d9d2a47199244ed0d61ef9d28e1afea3/lojotaloviwoz.pdf In PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e58acbd8b1---53289004075.pdfIn PDF document text
    • http://sl1971.com/clients/5/51/517263f0417f9379c67e6eba0e0bdfe8/File/finukonefum.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/a8b9ee09365afca1bc95a464bbf68a8c/zoboja.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/827621ba23b7d1b7580ceb00ebdc0aca/10574378037.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/3e689e8ceea51e06fe72cbcb778e13db/59639735527.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/kinuwunefaramanaxox.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a3b467fd4---72104712388.pdfIn PDF document text
    • https://menu2uplus.com/images/file/kafozixunipomu.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/22533139658.pdfIn PDF document text
    • http://maketmaster.ru/admin/ckfinder/userfiles/files/gamom.pdfIn PDF document text
    • http://americansemitruckparts.com/d/files/jerupak.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/05c8287e2dc03ddc1299b64f88e25364/damiv.pdfIn PDF document text
    • https://bem-sa.com/img/file/79683878469.pdfIn PDF document text
    • http://sunarfactory.com/userfiles/files/tovejowemeni.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/d4ab1d583ccf87294f3b2591558b1c16/wutamunizisazitodu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=louis+de+broglie+1924PDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4F 4988 bytes
SHA-256: ba5f90a28084c8c71c15d8248fa713cd3243282138f630bc9066e0083c9bc575
font_01_sfnt_off0000f04e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04E 13312 bytes
SHA-256: 32f7ea88f21cfafb2759602e0f01b9623e45340269026cdf92111d59f81f9f64
font_02_sfnt_off00011a04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A04 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176