Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab78373e64509d5…

MALICIOUS

PDF

79.2 KB Created: 2020-11-30 02:45:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 1832610fa3fb2cf610210296c1109f0f SHA-1: b439a4b726de4c2aa649a99dfc3cfd38d124d2ba SHA-256: 6ab78373e64509d55f609e27f51a71e4bc7fe48a50ff22a83c826cad3146c61b
156 Risk Score

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://traffset.ru/123?utm_term=bruh+city+google+maps PDF link annotation
    • https://rizigavitud.weebly.com/uploads/1/3/4/5/134581125/nuzitumi-jaxuduzexefeb-latasekakilo-gavomowig.pdfIn PDF document text
    • https://botubadixebom.weebly.com/uploads/1/3/1/4/131407995/5925643.pdfIn PDF document text
    • https://sefufomoxuve.weebly.com/uploads/1/3/4/5/134528328/4097042.pdfIn PDF document text
    • https://jokatilowiwege.weebly.com/uploads/1/3/4/3/134369617/mikawisu.pdfIn PDF document text
    • https://repenakexo.weebly.com/uploads/1/3/4/6/134600143/8f09c9.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/4ce065df.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/817af0b8-2f39-434d-9110-deb41e976d20/proper_format_for_writing_a_letter.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/car_accident_reports_in_utah.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/27269441848.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/20146440760.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/unblocked_games_pinch_hitter_2.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/brookville_high_school_lynchburg_va_reunion.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_off0000f97c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97C 5500 bytes
SHA-256: 44f5b7e647e91a99aca5ca12cfdcc20313e3fb885667edf372a2ed57dcc536ec
font_01_sfnt_off00010c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C10 10636 bytes
SHA-256: 683cf5a93c4e7e8f4b6d3e6075113c40636ed895823bb80420b4dff37f2ebddd