Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fa99885474094b5…

MALICIOUS

PDF

78.3 KB Created: 2021-04-12 04:30:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c030b6fb1dfe2838029ea243f0eaa6fa SHA-1: cfde4fc1ac6a70b889e18df05df28ad8441aee1e SHA-256: 8fa99885474094b501f35af6efa4812c23a9cf4f257b6f5c83bb8559229cd850
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://maypoin.ru/strik?utm_term=dnd+5e+best+classes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416299/normal_603882c51f959.pdfIn PDF document text
    • http://mitedujonajezed.scienceontheweb.net/suwutokaxijo.pdfIn PDF document text
    • http://creditscoretracking.info/how_much_to_add_dvr_to_xfinity64qlo.pdfIn PDF document text
    • http://xariketixagat.mypressonline.com/why_wont_my_aux_button_work_in_my_mazda_3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444882/normal_60389089d5069.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505699/normal_6063ced946f00.pdfIn PDF document text
    • http://ryursew.space/examen_ser_bachiller_2019_filtrado0aey6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369671/normal_6035a0dc68b75.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/NtjhiaS/rijubifagipizademasu.pdfIn PDF document text
    • http://vofufime.mypressonline.com/serewizovebesefemunofore.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478926/normal_605d855be8215.pdfIn PDF document text
    • http://pogibofabut.getenjoyment.net/damolijazirirodokimokasaj.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/eghjdie/56121661264.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/ea69d063-320f-49a0-b150-63a199629f1b/general_data_protection_regulation_gdpr_compliance_certification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c014a67-f6a2-4068-a984-e5062b0da033/xufupekadanib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4ff5d12-275b-4e80-a440-ac66903bb21b/77053018330.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/android_mode_secure_check_fail.pdfIn PDF document text
    • http://nokejufesuw.atwebpages.com/business_productivity.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/wesutivi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47ec1a07-1398-4474-945e-2d24a08af8e2/vewobamakawe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c8749a7-e0fd-4dc3-bdd8-cf2fe6e1a60f/45953063306.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/letter_of_interest_template_uk.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF548 5100 bytes
SHA-256: 865c880ae418ff1ec4856f5ef882f7da4168a325b94d800830a35849d627d307
font_01_sfnt_off000106b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B8 10496 bytes
SHA-256: df839e6a914259345fa72dd5632403351953b18f4d36164b664765b4d38724fe

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