Malicious PDF — malware analysis report

Static analysis result for SHA-256 317f9987de9fc1c0…

MALICIOUS

PDF

83.1 KB Created: 2021-05-04 13:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 82091ea00e1864ba220bad911141e8f2 SHA-1: 9f05823751951b396aefaf4118859bc221be4eda SHA-256: 317f9987de9fc1c0de214b9bd04855d4b531d7940d860cff0bee614a3febed2c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://seumenha.ru/strik?utm_term=what+does+de+donde+es+tu+amiga+mean PDF link annotation
    • http://misefaditiza.22web.org/fumesilakemifovono.pdfIn PDF document text
    • https://cdn.sqhk.co/lokabawopup/hcifOgd/tmnt_portal_power_pc_review.pdfIn PDF document text
    • http://zikuwojanubeg.iblogger.org/lunumebixiwizumolaseje.pdfIn PDF document text
    • https://cdn.sqhk.co/xefilelo/gIicXrc/12113779016.pdfIn PDF document text
    • http://dadevizevarek.scienceontheweb.net/inorganic_fertilizer_advantages_and_disadvantages.pdfIn PDF document text
    • https://cdn.sqhk.co/lepudijazur/grgiijb/84457272896.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwolegu/iibifpQ/96429563506.pdfIn PDF document text
    • http://bafedudovodamo.medianewsonline.com/anthrax_in_wild_animals.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluwumenad/gjc3zgc/67423517799.pdfIn PDF document text
    • http://purunuza.iblogger.org/10510743451.pdfIn PDF document text
    • https://cdn.sqhk.co/nikofejujel/2GihjfL/kilumegivebi.pdfIn PDF document text
    • https://cdn.sqhk.co/mexovaru/BThcT4U/63792717478.pdfIn PDF document text
    • https://cdn.sqhk.co/mikedeto/jhic1id/gunnersaurus_salary_per_week_uk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/235726f4-95a0-40b9-ac7d-bfbbd22acd3a/68279962175.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2c635ec-66c0-4fd8-b44a-3db3f0b28840/what_is_paperless_communication.pdfIn PDF document text
    • http://navenogu.rf.gd/fexawib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bca56e6f-a389-4503-82ae-e3c580f47aa0/tanidiwonawepokusetuxu.pdfIn PDF document text
    • http://saridojuja.epizy.com/antenna_definition.pdfIn PDF document text
    • http://nemenarubaz.atwebpages.com/xedidiwuzoz.pdfIn PDF document text
    • http://bazusokilole.rf.gd/kirefugiloloretemevu.pdfIn PDF document text
    • http://xujalupa.epizy.com/free_able_resume_templates_for_wordpad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3580c79-deb4-48d9-acdb-586b451a14a1/rafuguwojeruninuvon.pdfIn 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_off00010092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10092 5124 bytes
SHA-256: 234703b010dcb44104e6fc57ef15b91135b7249479e270579afcf9edc4cefd60
font_01_sfnt_off000111e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E9 13620 bytes
SHA-256: 8df6467283bd06e57848c615687294ada003315fa0a1b15b725e0dc1202c6ba0

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