Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb83883fabb833a9…

MALICIOUS

PDF

68.6 KB Created: 2020-12-17 02:46:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: eca769747ef3d5a3f582ffed4995fcd7 SHA-1: affda90c527df8bc52e4fb83b7ef568fff11502d SHA-256: fb83883fabb833a905c488c265cda3186deb786dcdf67fe161d265970927ba30
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, identified as a link farm, and one external URI. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or SEO abuse. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9733

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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?utm_term=hot+air+balloon+gas+law+problem PDF link annotation
    • https://xaxovalalek.weebly.com/uploads/1/3/4/0/134040353/salesuvawa.pdfIn PDF document text
    • https://mawijazug.weebly.com/uploads/1/3/1/3/131380733/3857769.pdfIn PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/7a015d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/ranuzinurilax.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/tavivukowolunopirovirefa.pdfIn PDF document text
    • https://s3.amazonaws.com/virumutipalis/gupajufo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83bc29da-0e3a-4c30-b2bb-c164501a2ab6/service_manual_bosch_dishwasher_she.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/wujigopazabalamuzifulizal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eabcaf84-ab24-443c-8af6-4b256f7af4de/4591889992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/618c8c1d-2110-4f75-8b17-de8ef2113918/97421882853.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/custom_sheet_metal_signs_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bef5f44-878c-4f06-a85e-ef3c2169bdb1/holiday_inn_express_tv_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/magnifying_glass_guess_the_emoji_answers.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CC 5332 bytes
SHA-256: 4ca233cab3ea32aa2e41988eab26f15fad3f7d3b9aa3768b9050476ba0a37224

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