Malicious PDF — malware analysis report

Static analysis result for SHA-256 d33765be66cddeaa…

MALICIOUS

PDF

72.4 KB Created: 2021-03-03 18:37:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 14996801d01f7948ba5227ffe7b36ea9 SHA-1: 2968ad37c6d32be9b0f946ba82e69ca16cee7d61 SHA-256: d33765be66cddeaa964ad0648e6fe37019cd6ba215cdde1362692e0e17fb4e76
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is likely a phishing lure. ClamAV and ML classifiers also flagged this file as malicious. The document body, though heavily obfuscated, suggests a search result context, reinforcing the phishing lure. No scripts were extracted, but the presence of external URIs indicates an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://xajibur.ru/wix?keyword=mini+cooper+repair+manual+free+pdf PDF link annotation
    • https://cdn.sqhk.co/noxobabidof/RWxpnCC/xepidu.pdfIn PDF document text
    • http://tideparipawovu.mygamesonline.org/xosejevipomonaxonolagipa.pdfIn PDF document text
    • https://cdn.sqhk.co/tunuviju/eifghjb/leap_of_faith_dance_wetumpka_al.pdfIn PDF document text
    • https://cdn.sqhk.co/runudori/f8ejejc/kinebuxetuna.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/nupesilokaz.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/gidakuropowij.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/what_are_defensive_driving_skills.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/tsXgjid/22022715442.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/xakajoziwibi/vezab.pdfIn PDF document text
    • https://s3.amazonaws.com/gekojulog/astitva_full_movie_300mb.pdfIn PDF document text
    • http://dopovis.myartsonline.com/meminomaxodan.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/nuravosisomuvozasijateva.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/bear_ear_headband_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/nudinukefogiv.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/30540789945.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_off0000def8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF8 5128 bytes
SHA-256: fd8bef7fddd76f10c10aceccaad7c4f9cf4d8d2ee3294d7a17d234f4af8fe854
font_01_sfnt_off0000f061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF061 10720 bytes
SHA-256: a985b26f931534d18836840203353d0b4da80154db8cf8edf7ba50c277ce6a7e

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