Malicious PDF — malware analysis report

Static analysis result for SHA-256 563729211ef872e7…

MALICIOUS

PDF

74.9 KB Created: 2021-03-02 20:44:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 06fcc8f206202d81ca85062c9adc1d61 SHA-1: ed4f843728fe6427066a3d99ad5285e74ec13f2f SHA-256: 563729211ef872e7fa5a9630601124f9609a6b8e86f4084aae072b6233e01cc4
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, identified by heuristics as an external URI and flagged by a machine learning classifier and ClamAV as malicious. The document body, though heavily obfuscated, appears to relate to the URL's theme, suggesting a phishing or social engineering lure. No scripts were extracted, but the presence of a malicious URL and the detection signatures indicate 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://resalured.ru/123?utm_term=how+to+use+an+ergobaby+infant+insert PDF link annotation
    • https://cdn.sqhk.co/gejupajo/mgfiegd/xelujopaxulegenaxibala.pdfIn PDF document text
    • http://vobalemujumojak.mywebcommunity.org/zigepitaziwuterejuru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480423/normal_6032a8d565479.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490274/normal_5fd04d2375bc7.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/jiaW3y4/jeguratu.pdfIn PDF document text
    • https://cdn.sqhk.co/libuzewis/ioaZjag/moto_camera_2_port.pdfIn PDF document text
    • https://cdn.sqhk.co/xetorexevapi/KchijaS/thrift_stores_in_manhattan_beach_ca.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/jcMqCC6/witiduwibewefa.pdfIn PDF document text
    • https://cdn.sqhk.co/jigitovewuk/hhhijby/instagram_login_unblocked_at_school.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499979/normal_60126407cddfd.pdfIn PDF document text
    • https://cdn.sqhk.co/xafogatok/biehfXT/xegiduxufug.pdfIn PDF document text
    • https://cdn.sqhk.co/mogudekusab/tjbjcHf/balloon_ideas_for_boy_baby_shower.pdfIn PDF document text
    • https://cdn.sqhk.co/mixirulizab/gdBjaha/alienware_monitor_cyber_monday.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/vapelurowar/goropezekolomisu.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/43582321238.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/algorithm_book_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/types_of_addition_reaction.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_off0000e76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76D 5200 bytes
SHA-256: d1056cf1fc1a992af110e40b5e801df3e5516d800f20301e8e1dece7170cb949
font_01_sfnt_off0000f946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF946 10792 bytes
SHA-256: b7f49031b47746720e8d31c056095e629a6303209d7b4fb4f14fbc2294bf0cbc

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