Malicious PDF — malware analysis report

Static analysis result for SHA-256 52356152cc07eeac…

MALICIOUS

PDF

76.6 KB Created: 2021-02-12 08:04:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3f5d202e5c7c3002e637faf9dfede8ea SHA-1: 06b0d23338a8074d025feca4b0609baf2553e12a SHA-256: 52356152cc07eeac1b0223dc8334b0c727684d9d534aa7a68bce9b0c38da615c
96 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. The PDF structure itself appears to be intentionally malformed, with duplicate object bodies, suggesting an attempt to evade detection.

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
  • 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://crophysi.ru/123?utm_term=le+petit+prince+quotes+english PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4409801/normal_6002aa5be2fca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369318/normal_5fd9d9a1e5551.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502870/normal_5fc68cfb1a811.pdfIn PDF document text
    • http://klokisik.space/86555918723gweqw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491925/normal_60067221e58a9.pdfIn PDF document text
    • http://sodaapp.pro/popcorn_flute_sheet_musicfau03.pdfIn PDF document text
    • http://vatemuredaxusob.22web.org/apc_back_ups_pro_550_user_manual.pdfIn PDF document text
    • http://amandeepsadyora.com/84059174573dl8id.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458388/normal_601299711dcf3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392853/normal_5fe56f0aaf0f3.pdfIn PDF document text
    • http://antonio-ita.space/351530321146miz6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460946/normal_5ff9367177c30.pdfIn PDF document text
    • http://quinzsy-studio.design/nexojovi2v3f.pdfIn PDF document text
    • http://instapriz.site/403313756487jy7o.pdfIn PDF document text
    • http://vinograd.io/warframe_cephalon_fragments_marsytzd8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jamebixidi.rf.gd/civilization_6_guide_to_victory.pdfIn PDF document text
    • http://xibubew.epizy.com/42089710796.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_off0000ed1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1B 5052 bytes
SHA-256: 98218f452c7045e26dda29d5429201bce6005932e7586283b8a4f75e5bf06cb4
font_01_sfnt_off0000fe48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE48 12452 bytes
SHA-256: 6d4bdaab80d38b6d180e4175015698ab1695302b4f764233a99c58db5cc37284