Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a9458115064018c…

MALICIOUS

PDF

67.9 KB Created: 2020-12-24 21:45:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: a24ef650f5ffe8a95b860f5bc9c80792 SHA-1: d53f0f1a48b80f6664659455309c1812c892a61f SHA-256: 3a9458115064018c8da1089f5af3d9a3e95efb6a1e3b1d5995549839f4609f37
154 Risk Score

Malware Insights

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

The PDF contains embedded links to known malicious redirector infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to lure the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://cctraff.ru/aws?utm_term=city+information+modeling In PDF document text
    • https://winuvepesedop.weebly.com/uploads/1/3/4/4/134476249/pujepoguk-laguborofumoraw.pdfIn PDF document text
    • https://tadinitalu.weebly.com/uploads/1/3/4/7/134744808/fekimubemorutaxixep.pdfIn PDF document text
    • https://bekijarodik.weebly.com/uploads/1/3/4/6/134617997/7237958.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374362/normal_5fdc42f0dc875.pdfIn PDF document text
    • https://xesapexoxes.weebly.com/uploads/1/3/4/6/134633169/7994576.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382972/normal_5fb46ddc232d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377912/normal_5f8a7c43e385e.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/bewibiwat/fortnite_apk_free_download_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/fresh_thyme_rochester_mn_address.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/lodugakikaxiji.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_off0000cd89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD89 5056 bytes
SHA-256: 55904722b7f48eccc885183a857d963078b1c1f305d6f686f46fdc8251912100
font_01_sfnt_off0000deab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAB 10184 bytes
SHA-256: 934ff6ee7c89edb01a2169e8c7fa5ae613d9918873b6832ea1fe2319028f0e1e

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