Malicious PDF — malware analysis report

Static analysis result for SHA-256 86f644544b67472b…

MALICIOUS

PDF

71.2 KB Created: 2020-12-26 09:09:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 6fc0f4130cee8b85ca0ffd38298101c7 SHA-1: c1c2cc20160a3896f6ea319b0a32f5fefd21d61a SHA-256: 86f644544b67472be7c9c5479a9558d12ca389ff6940d32d8937dbb906ecd4f7
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing attempt. It contains an embedded URL that redirects to a page disguised as a wire size calculator, likely to trick users into downloading further malware. No scripts were extracted, but the presence of embedded URLs and the ML/AV detections strongly suggest a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafficel.ru/strik?utm_term=wire+size+calculator+blue+sea PDF link annotation
    • https://cdn.sqhk.co/kuruwoke/9ifRhaA/sebirofaxotu.pdfIn PDF document text
    • https://xurolimusogisuw.weebly.com/uploads/1/3/4/3/134395808/budategodeweli.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380691/normal_5fcf96c8609ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473445/normal_5fa83db1ba108.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366311/normal_5fdf2e3ea45be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419204/normal_5fb2ba6795b79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453329/normal_5fdaada37a3b1.pdfIn PDF document text
    • https://cdn.sqhk.co/tewisifupib/hheMSOn/msi_afterburner_oc_scanner_1080_ti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450037/normal_5fcc9b5571c20.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/sabobenuwe/jandy_spa_side_remote_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/zexupezevijenetepeli.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/apartment_1303_full_movie_720p.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_off0000daef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEF 4996 bytes
SHA-256: 9f4ccae626268ec0a2283013ff4590d2fb60211768593406de613a7090b41f8b
font_01_sfnt_off0000ec10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC10 10668 bytes
SHA-256: 28fe097f64223e5fbe3a9c713f670d37e0ffa8de03d7880236ccc27c36f536b0