Malicious PDF — malware analysis report

Static analysis result for SHA-256 be52c9fd409c5d3b…

MALICIOUS

PDF

93.1 KB Created: 2020-12-05 10:56:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 95a360bf9f794206a938d5a56d4af023 SHA-1: 1fee14d987c9f83e1e804525605ca9d8352dd90a SHA-256: be52c9fd409c5d3bfefcd4742d64bdcf0ecda5ecb293a0f126fcf3492f05c1b6
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 URI pointing to a suspicious domain, which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to 'worksheets for cognitive distortions'. No scripts were extracted, but the presence of embedded URIs and the overall malicious classification strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/aws?utm_term=worksheets+for+cognitive+distortions PDF link annotation
    • https://dokodajibebabek.weebly.com/uploads/1/3/2/3/132302773/mewevimupizove.pdfIn PDF document text
    • https://luwinititik.weebly.com/uploads/1/3/4/5/134587042/furaxi.pdfIn PDF document text
    • https://sewiwojura.weebly.com/uploads/1/3/4/3/134371681/9943523.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413707/normal_5fbeebc0b1cad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427300/normal_5fb5ece5b49e3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/08be53f3-6080-4f07-a73a-b555c33e7727/95073741677.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/cessna_414_performance_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/6118531128.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd079d3fdc31513a1122cd/1606223773859/logeladevadoz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54dfe3dfdd95b60f249af/t/5fc9a87e81b71b4085921aab/1607051391704/virgin_trains_peak_times_manchester_to_london.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc53a9d116eb00e3c685617/t/5fcb2a5fbce7087d1ad8c238/1607150176409/my_line_etisalat_egypt.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_off000130a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130A2 5176 bytes
SHA-256: 64c4fd792218f1084c1ecbb5db464dcb1540e7a4e3d8a44fd8b2210b13126d1b
font_01_sfnt_off00014258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14258 11004 bytes
SHA-256: 1cf9ef70a68f50d9fd30317ea59714b7e93b4ba32532ec5f8b56fe3755dd93e7