Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9fc9af3b3d4aecd…

MALICIOUS

PDF

76.0 KB Created: 2021-03-28 22:46:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0cad14f69accd224888eddc74b7e4a04 SHA-1: c61468d7ab4dd4de0cfca39de8fbac2dde40e41c SHA-256: b9fc9af3b3d4aecde1213dfca132d3ab9f29e5ba65e8d26c0e981da8d5aa28eb
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://golowaki.ru/award?keyword=casino+game+rules+pdf PDF link annotation
    • http://tacfitproducts.com/java_tutorial_videos_freetp0h9.pdfIn PDF document text
    • http://liketime.fun/honda_eu2000i_companion_for_sale_near_me8mgje.pdfIn PDF document text
    • http://wufamega.scienceontheweb.net/convert_html_to_angular_6.pdfIn PDF document text
    • http://freshmind.net/agilent_multimeter_u1232a_manualy6x1l.pdfIn PDF document text
    • http://phulop.store/zaginepurasiragrgsy.pdfIn PDF document text
    • http://ebay-coupon.ru/657359737054x49a.pdfIn PDF document text
    • http://familyit.info/fepevefalibirutawetufaj4ca.pdfIn PDF document text
    • http://dekoriribazovax.mywebcommunity.org/74642202574.pdfIn PDF document text
    • http://loneresel.mygamesonline.org/rodoruve.pdfIn PDF document text
    • http://glawerry.online/create_your_own_blog_website_and_make_moneyre90c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://29aa9d28-cc9d-45fc-8d86-3718b5881c84.filesusr.com/ugd/74c34a_87201bf223304cc8b47c46b69e8f9798.pdf?index=trueIn PDF document text
    • https://8533cbf3-c0d6-400c-bdf8-8ca38cf0242b.filesusr.com/ugd/135178_c65a225ee995430b82358ae892bfa262.pdf?index=trueIn PDF document text
    • http://wipibefab.onlinewebshop.net/administracion_de_la_calidad_total_aliat.pdfIn PDF document text
    • http://gujimosodaza.myartsonline.com/pathology_of_pulmonary_tuberculosis.pdfIn PDF document text
    • https://571cbd0a-ba82-408d-be6d-2df53a8fcfe5.filesusr.com/ugd/02af14_d59c0ab95fe3496f889e9d1ddea5acdf.pdf?index=trueIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/38474811880.pdfIn PDF document text
    • https://b7f5b04e-b247-49a4-9dc0-39f0c843ec09.filesusr.com/ugd/b56f86_1d55400ca2694ac59f319200d0b32b1c.pdf?index=trueIn PDF document text
    • https://ebd73b9a-b255-48a5-b781-2bd84b483b4c.filesusr.com/ugd/956c05_86dfb2f220b44351b7e7d9c6c1cb59fb.pdf?index=trueIn PDF document text
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA08 5268 bytes
SHA-256: b1abac80979004d4d925e24d645eda1e261bc5e46a872ec0621a597d982a90ca
font_01_sfnt_off0000fbda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDA 11200 bytes
SHA-256: cfdf17f9d091f36bff9ae8f55bfee23a97143058cf07224e6ee47eeb41a99815

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