Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba39cb8a65a145fc…

MALICIOUS

PDF

78.3 KB Created: 2020-11-28 00:47:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9368083c30ef503c9105a91615ac8d42 SHA-1: d112992f109fdca284b98549a380f15d0273f72d SHA-256: ba39cb8a65a145fcae802c15ee143e629370d85b60da4c02b9bd78f7fe78257d
154 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to known malicious infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV also flagged this file as malicious, specifically as a phishing trojan. The embedded URL is likely intended to trick the user into downloading malware or visiting a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cctraff.ru/aws?utm_term=bitdefender+virus+removal+tool+free
    • https://cdn-cms.f-static.net/uploads/4420903/normal_5fa15f87cbbd8.pdf
    • https://zoxamadafipezo.weebly.com/uploads/1/3/1/1/131164297/5922405.pdf
    • https://dolilifiwu.weebly.com/uploads/1/3/4/4/134401054/kavadupesavo.pdf
    • https://xuvetopugoseja.weebly.com/uploads/1/3/4/4/134484667/e239f97017e92d.pdf
    • https://valetakomo.weebly.com/uploads/1/3/4/0/134012509/tipadimisilisi-kukireg-remub.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bf2396c3-14c9-4978-a785-40b5ca810611/conan_exiles_horns.pdf
    • https://uploads.strikinglycdn.com/files/126247d6-a95e-40c2-8a9f-ee265fb28e2c/8_ball_pool_online_generator.pdf
    • https://s3.amazonaws.com/tawosutosuxi/gisuva.pdf
    • https://uploads.strikinglycdn.com/files/5b213c99-c4cc-4719-8886-1ca1d3225d11/blublocker_sunglasses_review.pdf
    • https://s3.amazonaws.com/xebuvuwov/14335140357.pdf
    • https://uploads.strikinglycdn.com/files/213d7172-ea80-4abb-bca6-afa65a0ed8ff/lodevejuwudu.pdf
    • https://uploads.strikinglycdn.com/files/e96d4aaf-c5b2-452f-aeb7-dfbdb9da01f3/10786339169.pdf
    • https://uploads.strikinglycdn.com/files/3a521db8-18ac-44c2-9039-0679c77b388e/wuvozojasabexuxowaw.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_off0000f6a0.bin
c13c7788c88be5dd28367e35c63f1bd95536074cfa40e2feb579c9facfb62052
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A0 5164 bytes
font_01_sfnt_off00010820.bin
1f811db5e54fe2699ea38c98db68df1d0d9605eb73533149c05e365e50f69adc
pdf-font-stream PDF embedded font (sfnt) at offset 0x10820 10600 bytes