Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e4aa43ba2166562…

MALICIOUS

PDF

65.8 KB Created: 2021-02-04 10:16:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: ede0ed2e43820bd569dd21a26f036c5f SHA-1: 763f842e16db3fad081b8508a67a26a0d5161834 SHA-256: 1e4aa43ba2166562244079d3c79999961f8d0eeeb5fcbb66b7f77f1bc2c02803
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URL that leads to a suspicious domain, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to 'Cap reporting breast cancer', which is likely a lure to entice users to click the malicious link.

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://jacksth.ru/aws?utm_term=cap+reporting+breast+cancer PDF link annotation
    • https://cdn.sqhk.co/pagifizipafo/0Lhe7sz/kamimufijomejosiluku.pdfIn PDF document text
    • https://cdn.sqhk.co/betewulo/viihibd/zotolevewegaboze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389366/normal_5fe901653bd7e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369324/normal_5fcd27f27c360.pdfIn PDF document text
    • https://cdn.sqhk.co/girasufu/hgLiilQ/water_slide_bounce_house_for_sale.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/xakusineba/web_services_aptoide_apk_install_farming_simulator.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/edpb_guidelines_contractual_necessity.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/karthus_jungle_guide_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/93244105820.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/relationship_between_attitude_and_behaviour.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/baby_images_cute_smile_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/4618776334.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/71418845709.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/computer_hardware_and_software_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/90466551607.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_off0000c5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5FD 5116 bytes
SHA-256: 49af8a5dad0cd1e5846a39772f62e8d6f2c2a6b6b852b2ae21180cde8a20932e
font_01_sfnt_off0000d76e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76E 10080 bytes
SHA-256: 27a18b8b2b626278574e2c30fb39b027e979f48736673c57edce11eec0e2bce3