Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8b22089a3f14e93…

MALICIOUS

PDF

92.0 KB Created: 2021-01-16 11:56:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 7c801091938932503209e47026482ed3 SHA-1: 5694d8054c79f6d4870dd0a6642eaaf0508de984 SHA-256: b8b22089a3f14e9379423d2698b6fc78e7933d581fbf5e8c3d4f5e9b64ab4631
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support this assessment. Although no scripts were extracted, the presence of a malicious URL and the document's deceptive content suggest it is designed to trick the user into navigating to a harmful site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffine.ru/aws?utm_term=rental+agreement+format+in+word In PDF document text
    • https://bixowupe.weebly.com/uploads/1/3/1/4/131409305/60c1145afa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462974/normal_5fa4a4333336b.pdfIn PDF document text
    • https://site-1178040.mozfiles.com/files/1178040/68386286340.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379385/normal_5f9e401ba551e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489251/normal_5ff7813daccd7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378604/normal_5ffe8563a5c23.pdfIn PDF document text
    • https://site-1171628.mozfiles.com/files/1171628/67937568474.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/dakebesuvum/may_2018_calendar_excel_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/arpansa_nuclear_medicine_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/tufigerererewexizi.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_off00012d0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D0D 5148 bytes
SHA-256: e4a093aa0ab7ad5c158a8aa48b17bb6c38cc34b3d255ec7cfa774729fa99ce5f
font_01_sfnt_off00013e94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E94 10836 bytes
SHA-256: 429931db9c4c63c014ffd589be1962aacf65b1b9cb088b4703c5995627afb216