Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dbb300e55de821a…

MALICIOUS

PDF

37.7 KB Created: 2020-11-06 08:18:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 587dcc5956c863950857945a605dfa9c SHA-1: e98758dde2b1e2c8acdb91f048b74887cff45653 SHA-256: 8dbb300e55de821a74cf836af51f6d2ef6fedbcb25e216c9a69c113eaa23730e
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous external links, a technique often used for SEO spam or to distribute malicious content. The primary URL, 'https://trafficel.ru/strik?keyword=cheats+for+charm+king', suggests a lure related to game cheats. While no scripts were directly extracted, the PDF structure and the high number of external links, including one to a striking.ly hosted PDF, indicate a potential for distributing further malicious content or engaging in link farming. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafficel.ru/strik?keyword=cheats+for+charm+king PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370074/normal_5f8a06426fa7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412158/normal_5f9ae19375ff5.pdfIn PDF document text
    • https://talinupujisen.weebly.com/uploads/1/3/4/5/134591269/safezedebenabop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387716/normal_5fa489fdae38c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383688/normal_5f8cb694947b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389816/normal_5fa4738a1bea4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416932/normal_5f9a08cd115f3.pdfIn PDF document text
    • https://vapipokolodux.weebly.com/uploads/1/3/4/3/134307816/duwabafefis.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/c89998a7-ee4b-480c-8116-0d75743b4e83/10673097328.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/michael_beckwith.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85444c63-7277-474b-aebc-47c1c5b67293/varisugulazogoximigawesa.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_off000055e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55E8 5232 bytes
SHA-256: 08e07596dd47183b80717c90a40bdfd53457ea19f9f81ee9c76f05c13206e31b
font_01_sfnt_off0000678a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x678A 10216 bytes
SHA-256: c3f1769e10e68387855bf6d501d3b99b18a75aed9d51d15aef3b16be58167585

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