Malicious PDF — malware analysis report

Static analysis result for SHA-256 7468bf1c32edbc89…

MALICIOUS

PDF

74.1 KB Created: 2021-02-27 21:34:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 6952fc8d14dde57a03f6a756f7dfd15d SHA-1: b57f5f99f38f722b2818b31253695d42ef0a23c6 SHA-256: 7468bf1c32edbc89feb37b0837fbc6746c89d367d0a028e4377fe153cfe020c0
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, and ClamAV detected it as a phishing trojan. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of external URIs suggests an attempt to redirect the user to a malicious site, likely for phishing or to download further payloads.

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://resalured.ru/aws?utm_term=rocket+engine+combustion+chamber+design PDF link annotation
    • https://cdn.sqhk.co/jujejorule/vhhij15/hd_camera_ps5.pdfIn PDF document text
    • https://cdn.sqhk.co/kidatufo/yxwhaCV/band_for_kids.pdfIn PDF document text
    • https://cdn.sqhk.co/furigelo/etvghzZ/47773124020.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvapolaxaj/oikgedA/mybusiness_irancell_ir.pdfIn PDF document text
    • https://cdn.sqhk.co/vekotevudoze/jja6ham/wapeso.pdfIn PDF document text
    • http://difavusimope.iblogger.org/interior_and_exterior_angles_worksheet_kuta.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/jarawaxanivu/crbsi_idsa_guideline.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/free_powerpoint_template-_food_and_beverage.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/halfords_smart_battery_charger_plus_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/vuguzufibezupoveni.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/kufalojixidutefuta.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_off0000e4f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F7 5532 bytes
SHA-256: 6a44a967c65c661c8f48164e8e1afaa5a8273e3321995204eadd90313adbc7e8
font_01_sfnt_off0000f7a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A0 10560 bytes
SHA-256: 327b6dcb9ea765c02ba11c263f7fbcc0c143c0b80fb6a9b7eb6e5bded2b077e6

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