Malicious PDF — malware analysis report

Static analysis result for SHA-256 b237853c8071151b…

MALICIOUS

PDF

70.5 KB Created: 2020-12-14 19:47:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3337a8c0ca2a3f6feddb065e4498ce04 SHA-1: be541abce80c8b66130960f1ce88bfdce0ac79a2 SHA-256: b237853c8071151bd06e899ec7bcfeeed4c5ab82a0cf8e17204ea79aac7c5431
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. 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, contains text related to 'Prince of peace painting artist' and application metadata, suggesting a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/123?utm_term=prince+of+peace+painting+artist PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470962/normal_5fcff392a46ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366400/normal_5fa3597a29a56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418584/normal_5f98d187cbdfb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414682/normal_5fc6840fdb1d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412413/normal_5fa5334bb95fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456999/normal_5fa95b543e949.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc115d62bbd7406580792b0/t/5fd19c77ce71ee580fa67af8/1607572599977/75162771071.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5df257b-7631-40f2-a769-df556a035175/77591948475.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc77c265426f52a30df419d/t/5fcf9ff60496d067bddb17bc/1607442430473/match_3_jewels_puzzle_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af683515-6b45-465a-9107-22e72cad4de0/xoxokizajerarufuwojoboz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b41ffd3-7033-446a-a524-87ef41057564/86496035123.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85c7cf30-12ed-4bb5-ae19-f51b76356877/eyvah_eyvah_3_full_izle.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e44e92c50b1a1e7784dc/t/5fc154073570fb44d1342a0c/1606505479408/51574006859.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f176ae84-095b-4c72-9723-14dfeed23d50/tigalonitadilu.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_off0000d5e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E8 5152 bytes
SHA-256: 561317c5103045f20627deed9306014d6ccc91146fef26abb32924e15bffa16b
font_01_sfnt_off0000e786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE786 10964 bytes
SHA-256: 69ba61c610061873bcaae3547db5a456bcc155711ea781371797f71e2d3e78e1

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