Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cd50640df99cbdc…

MALICIOUS

PDF

79.9 KB Created: 2021-03-06 01:52:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cd0116451ffbdbb5d3fd30d4e453eddf SHA-1: 89deefb637145befbbd6b3a9b853f33f60d75c29 SHA-256: 8cd50640df99cbdc80cede051702fb38777d956021235b6e076e7589976947a8
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 0.9992

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://vilenefex.ru/123?utm_term=iphone+airprint+not+finding+printer PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4501770/normal_5fcb101664331.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370528/normal_5fce542f36815.pdfIn PDF document text
    • http://durasazi.iblogger.org/another_world_achievement_guide.pdfIn PDF document text
    • http://jevopapivixepe.iblogger.org/10982851443.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527357/normal_6026085fde5f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486565/normal_600cf48a09499.pdfIn PDF document text
    • http://gopumapi.iblogger.org/diablo_3_build_guides.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497081/normal_5fd651d422a2d.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/b9813f19-460f-4f20-90f8-79f15e7f0912/63276715492.pdfIn PDF document text
    • http://tidukalimipeba.epizy.com/how_to_change_transmission_fluid_honda_accord_2012.pdfIn PDF document text
    • http://tukozadagafewan.rf.gd/69616287840.pdfIn PDF document text
    • http://gizadopozi.epizy.com/antwerpen-_centraal_platform_map.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/monthly_calendar_template_2019_google_sheets.pdfIn PDF document text
    • http://kimitumepogamom.epizy.com/84634921219.pdfIn PDF document text
    • http://gafomawonerif.rf.gd/guxak.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/ifapme_liege_formation_chef_d_entreprise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b651854-d383-4faf-bfd7-189edb7696e9/mutiwodefewo.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/bebas_neue_bold_normal_font_free.pdfIn PDF document text
    • http://tujotabupogi.rf.gd/propresenter_5_moving_backgrounds_free.pdfIn PDF document text
    • http://gosidopofabuv.epizy.com/vonorezupabiriwezona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c68233c4-d314-4428-89a6-644e37197f24/when_should_you_make_your_relationship_facebook_official.pdfIn PDF document text
    • http://xogowiv.epizy.com/love_languages_list_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94e087a2-a7b4-44e5-abfd-e42f3c9efd4a/radawutorof.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_off0000fb49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB49 5028 bytes
SHA-256: 30cd9e7b4a46001ad3c808c64547c5f5a395ea88f7c6663a020e378764d5d848
font_01_sfnt_off00010c64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C64 10980 bytes
SHA-256: 8d2f4a6eb60fef2ba089913c293bb6067ad513fff1b36efd95744a033ec72928

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