Malicious PDF — malware analysis report

Static analysis result for SHA-256 65bbdfe91fb7fae9…

MALICIOUS

PDF

75.0 KB Created: 2021-02-26 06:52:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 891929d93644eef956a0de3a2bdbd843 SHA-1: 80a4c6b7b09a13ddbc51c5071a1bc4bdeb230431 SHA-256: 65bbdfe91fb7fae95a301bbd17bb4f1cf84acaacb04b2eb1edf6a3e69712bb8a
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL that mimics a search result, likely intended to trick the user into visiting a malicious site. No scripts were extracted, but the PDF structure and embedded URI suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/strik?utm_term=what+is+the+wps+button+on+a+canon+printer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403557/normal_602ee9805c8df.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/jjIshib/mobile_legends_adventure_cd_key_redeem_august_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/repudodo/72giDGk/king_s_throne_game_of_lust_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369304/normal_5fc588c1d882b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470040/normal_5fdd039509cdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379974/normal_60377943f015b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415745/normal_6005387221a59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392237/normal_6022d042b29e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426547/normal_5feec40100280.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458132/normal_603602ffdd4ab.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/2YjaFhc/99295921332.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403684/normal_5fdfc684d878f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482002/normal_5fd7b42bd25e9.pdfIn PDF document text
    • http://ch-data-2a8fv9s.pw/loud_and_clear_speech_therapy13alz.pdfIn PDF document text
    • https://cdn.sqhk.co/boxoveru/4ifXij0/55265391218.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/memobofilenabon/76624556551.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_off0000e72f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72F 5236 bytes
SHA-256: b5d59a9bb2e1b295b26f431ef85aced18c75c9e5e485e430b7886b10a8531914
font_01_sfnt_off0000f907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF907 10904 bytes
SHA-256: cb1b5a03c069a65a6af25e1441676b21643ffd3b720c5716e90f019cef38f860

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