Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b9859089aac6c5…

MALICIOUS

PDF

71.8 KB Created: 2020-12-28 17:06:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 889f6f0d3b567fd3a15d0c888fe7e095 SHA-1: e77a79177fed775fc615268c3f026f5f18015421 SHA-256: 60b9859089aac6c5958291035e0edae7ae459d23d92be1585271b32c36cf3c6d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to PDF files, suggesting a link farm or SEO spamming technique. One prominent URL, 'https://trafftec.ru/strik?utm_term=minecraft+servers+2020+pe', is directly embedded and appears to be the primary lure. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/strik?utm_term=minecraft+servers+2020+pe PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370268/normal_5fdbc2814fc8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381287/normal_5f9160372e6d7.pdfIn PDF document text
    • https://dawemewi.weebly.com/uploads/1/3/4/7/134747996/baac77f173f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388432/normal_5fb8be387fcdf.pdfIn PDF document text
    • https://mokoluwi.weebly.com/uploads/1/3/4/5/134595511/fagutidav_virewimufimefi_bodusonojo_poligikidediva.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387709/normal_5fcfacfba7147.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388824/normal_5f92507d9e466.pdfIn PDF document text
    • https://porovepo.weebly.com/uploads/1/3/4/5/134527374/pejelumewotigoj_zukodotexowu.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/f0becd2a-f2f2-4dcd-9a08-515a63a3b590/96013966294.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/ieee_template_article.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09c4fa69-2d6f-41e5-ab03-cd791d456919/75349481461.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/financial_reporting_process.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d56f39c4-34fe-4509-bd37-332ad7430d17/87280797410.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF1 5316 bytes
SHA-256: 21a754b82d3e4b006be5d76a8e9702386869f06de273e398a99705e59fe71282
font_01_sfnt_off0000e022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE022 2512 bytes
SHA-256: 8317cd94aacd0e6fd2e5c5989436fc68523f0f63f127755fdc62916090c89fd7
font_02_sfnt_off0000eb15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB15 11764 bytes
SHA-256: 89bedafebc3e2e0900f4a019650a171e25d80e34dbc72135d2acf84a2f34f2ea

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