Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c0e1fb63ead06de…

MALICIOUS

PDF

89.6 KB Created: 2020-12-31 00:56:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8352b62e9e436224f11ca73c27d26be0 SHA-1: d51de5ff52701b60d3c8ac4e474cb98418edc248 SHA-256: 7c0e1fb63ead06de2193c615f853328d19622ea151f238370a649ab47a5fffbb
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

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 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.
  • 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://traffine.ru/strik?utm_term=world+building+craft+game PDF link annotation
    • https://zepekerikolex.weebly.com/uploads/1/3/4/0/134017535/3578847.pdfIn PDF document text
    • https://cdn.sqhk.co/zifakepavax/iijcjAB/simple_minds_league_of_nations_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/lukedivibeb/jiihib9/54959395876.pdfIn PDF document text
    • https://cdn.sqhk.co/denepepunuja/ljhgjbA/vivetafuxodiwurogoravopu.pdfIn PDF document text
    • https://cdn.sqhk.co/zadorari/geifg7l/free_movie_streaming_apps_for_android_tv_box.pdfIn PDF document text
    • https://cdn.sqhk.co/miwizawi/cjcruUh/get_subscribers_views_for_youtube_apk.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/ad64ff53-6fc5-496c-937f-b9e803c67587/95274122048.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8eb8925-c0a0-4d43-9268-b46222dbc6d4/mods_carros_gta_san_andreas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c96990f-5500-4e0d-a7b9-37e1cb2fb151/xijedaninuvuwezulefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7da19cc4-4c2a-463f-a69a-57f7a39a0496/63492566366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaca5e1a-c970-4bcc-8ca7-7a2dccbe30d6/misunezawopulivojexukenap.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_off000122cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122CB 5316 bytes
SHA-256: dfbaf4e8bb1956a86c2ac7643b71a18297898db0397805a53ab618450bbf2a66
font_01_sfnt_off000134dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134DC 10892 bytes
SHA-256: 6806daaeb07bed8595728b5c7badbc95b437d4d8254a6e5566a0643e5f96cddb

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