Malicious PDF — malware analysis report

Static analysis result for SHA-256 da2104b18c5555ed…

MALICIOUS

PDF

73.5 KB Created: 2021-01-06 03:53:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2f94fe45b40a665761bf1104c28cde05 SHA-1: 5114c940f3446fcd0074eb498670829cba113bc1 SHA-256: da2104b18c5555edb27c8d89c7229f1f378cb4efcf57b5727b538687dabc661a
154 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a critical alert for a PDF redirecting to known malicious infrastructure. The embedded URL `https://cctraff.ru/aws?utm_term=centralization+and+decentralization+in+management+pdf` is a strong indicator of a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and the malicious URL suggest an attempt to lure the user to a harmful site, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://cctraff.ru/aws?utm_term=centralization+and+decentralization+in+management+pdf In PDF document text
    • https://cdn.sqhk.co/mujekesire/FjgjhXV/fawupomomuzijaret.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409122/normal_5fd7bd6031ff7.pdfIn PDF document text
    • https://cdn.sqhk.co/surudije/ic6lDwV/89992168293.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499300/normal_5fc9be3ed74b5.pdfIn PDF document text
    • https://cdn.sqhk.co/liregevo/hdjghgt/wigegitij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455387/normal_5fb8fa193b161.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451929/normal_5ff4f0eda13d7.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/fhbhigh/lucky_block_minecraft_pe_server.pdfIn PDF document text
    • https://cdn.sqhk.co/fopujetoros/7Xgj5Np/ligifov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462730/normal_5fa39d1cdfeff.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/a613930c-3ee8-4248-868d-9e369b0a9988/wirotixewonidifufukuz.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_off0000e299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE299 5252 bytes
SHA-256: eebcd841580ccd47871a5e1aead036fbdc0d31b7f700ca6a213a5a1af3e77fe4
font_01_sfnt_off0000f468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF468 10676 bytes
SHA-256: b6f36ba6b418777792bb6b726f9bcc0037233bc87e612fbfef5854247f71740c