Malicious PDF — malware analysis report

Static analysis result for SHA-256 13a55000817a0d10…

MALICIOUS

PDF

69.7 KB Created: 2021-02-20 00:17:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d48a01492cec24b5630aa0477b5611e1 SHA-1: f79b093cbfc9810bb94d8f887ce5831bf3616e54 SHA-256: 13a55000817a0d104405160736c44a587bc0043460a40bf84ef5e4f7d21bbd18
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URI that redirects to a suspicious domain, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of external URIs and the document's likely deceptive content point towards a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://baarspo.ru/wb?keyword=how%20to%20update%20kindle%207th%20generation PDF link annotation
    • https://cdn.sqhk.co/gabazumad/edkTgdq/mindset_synonym_wordhippo.pdfIn PDF document text
    • https://cdn.sqhk.co/nilesatu/Ggdihos/ube_crinkle_cookies_nutrition_facts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402940/normal_60013a71f2ba9.pdfIn PDF document text
    • https://cdn.sqhk.co/suxumeva/jjfhdge/wiletigelifelijomuwofemux.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/jagijcN/star_wars_squadrons_release_date.pdfIn PDF document text
    • https://cdn.sqhk.co/dapalufited/KWhbH1m/age_of_conquest_iv_mod_app.pdfIn PDF document text
    • http://ulekschool.online/bridge_to_terabithia_book_downloadqnx97.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/pibUgd0/heart_valve_problems_signs.pdfIn PDF document text
    • http://lajulufubugo.22web.org/gabetemebidiweranenofux.pdfIn PDF document text
    • https://cdn.sqhk.co/ledodatefu/hWidMwt/loborujow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472486/normal_601a013e5dbf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491969/normal_602eae911954b.pdfIn PDF document text
    • http://lakshmi-store.ru/prayer_prompter_app_for_androidc9few.pdfIn PDF document text
    • https://cdn.sqhk.co/tupujokuz/Xgh3Ugi/past_present_or_future_tense_worksheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d3a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A9 5240 bytes
SHA-256: 2e0346d61c4af545401665e6233570c852f36cdf0a49ea8c8f4d7723841c0cea
font_01_sfnt_off0000e595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE595 10576 bytes
SHA-256: c49648a81f6a3ebf37422e565f8e39b6e023f4afb7d6b4d33ef6eaf4232d3c1b