Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9056cfd87605a67…

MALICIOUS

PDF

74.4 KB Created: 2021-03-01 13:46:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5097884bbc9be135c681655de5e63c5 SHA-1: be600de9c8be773c3031a5a768595bf193c5b0c7 SHA-256: d9056cfd87605a67efe8f109666ce9cebe87c288c5f67e088b29d821d5931b1d
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic identifying a link farm pointing to 30 external PDFs. One of the primary URLs, https://botokaw.ru/award?keyword=the+ugly+american+full+movie+youtube, suggests a lure related to movie search results. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/award?keyword=the+ugly+american+full+movie+youtube
    • http://fotonagosuslugi-01.space/suwuwus8p8o.pdf
    • http://anstel.pro/dough_sheeter_rollerp8uiu.pdf
    • https://cdn-cms.f-static.net/uploads/4387433/normal_6029077362792.pdf
    • http://spiritstudio.ru/how_to_clean_bissell_proheat_turbo_2xbofj5.pdf
    • https://static.s123-cdn-static.com/uploads/4492588/normal_6003cfd8009aa.pdf
    • https://cdn-cms.f-static.net/uploads/4449615/normal_5fd3ce4bc6f1e.pdf
    • https://cdn-cms.f-static.net/uploads/4420902/normal_5fd29389be32a.pdf
    • https://cdn-cms.f-static.net/uploads/4466675/normal_5fd1d8a8d329b.pdf
    • https://sigajijatikad.weebly.com/uploads/1/3/1/3/131379485/xaxagibe_deforigazosize.pdf
    • https://cdn-cms.f-static.net/uploads/4404740/normal_602737c591239.pdf
    • https://zewabezasakaru.weebly.com/uploads/1/3/4/5/134593707/21842e0.pdf
    • https://cdn-cms.f-static.net/uploads/4389576/normal_602b02525e10f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tajimipojimo/diwuwelenubazajasunog.pdf
    • https://s3.amazonaws.com/panalipolifod/5530489200.pdf
    • https://s3.amazonaws.com/remavuj/widewebux.pdf
    • https://s3.amazonaws.com/sazariwapa/19282265433.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6cd.bin
ffdefadc285e331f3881ca32bf11b231a92573b9f2f18cb5f6a94bcaeae4c7e4
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CD 5368 bytes
font_01_sfnt_off0000f8ff.bin
d47e847c5eb9b189f7e7f97ea01bd7e61e33c351ee47df06d41cda4ead06bd33
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FF 10268 bytes