Malicious PDF — malware analysis report

Static analysis result for SHA-256 53e5a221b4b27c0a…

MALICIOUS

PDF

61.9 KB Created: 2020-11-24 19:19:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6cf20a64f1ef62df0e7fe42e946cfe92 SHA-1: 9de13474b39f81c77b379f436f6c7d051653642f SHA-256: 53e5a221b4b27c0af4a89970c1ae9b2694820c067b503674d4d84ed6debc3f00
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffmen.ru'. This URL is likely used to redirect users to a malicious site for phishing or to download further malware. The ML classifier also strongly flagged this PDF as malicious, and ClamAV detected it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://traffmen.ru/aws?utm_term=cricket+19+apk+android In PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/jixebezenefelod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382621/normal_5fa8f3831e457.pdfIn PDF document text
    • https://gedaxafi.weebly.com/uploads/1/3/4/3/134340736/7104066.pdfIn PDF document text
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/1300040.pdfIn PDF document text
    • https://kozesetod.weebly.com/uploads/1/3/4/5/134507136/4784554.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/c1e2a60a-35ce-4385-8f4e-1d1cfd86a394/derasinuzitilupopi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53bb1f4c-c178-4e5b-a406-74ff4918287f/42682803874.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b31c8e04-639d-4a43-802e-1f082ae9921f/lufonulatavavuma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46b0cbfa-d7c0-4b6b-803e-387dbc1b97f0/50789782723.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c489eff-e007-43ad-8ed7-13a4ad8ac1d3/12894786969.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/aztec_games_to_play.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/mazuw.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_off0000b78e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB78E 5032 bytes
SHA-256: 653d397213d0d3a789f9fd3776e7653ce166b615829c74de5acfd508ad8005a3
font_01_sfnt_off0000c8c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C4 10088 bytes
SHA-256: 1a3aa3a7837bfe5ee3f460a8e2348382477283427654ab5d2439a33d593a8e5d