Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fb5bb7e8f92f2fa…

MALICIOUS

PDF

65.1 KB Created: 2020-12-06 05:44:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: e7e5ddc71547479606c339876135dcd4 SHA-1: d31bd7478e4e826bc6b4b153b39455eb899b7df8 SHA-256: 5fb5bb7e8f92f2faea3eade7df798b6243fd270a31ff076105e35d6c0e0bc095
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, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or malware delivery. The PDF structure itself does not contain readable content, suggesting it is designed to exploit vulnerabilities or redirect users.

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://trafficel.ru/123?utm_term=svn+resolving+conflicts PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4452148/normal_5fc560c0040da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379473/normal_5fa9e90341db5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457857/normal_5faeb8809aa55.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/dowadotiju/82262336847.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfeb102bbd74065800e14d/t/5fcbf56aa87f9f1b19c26fc3/1607202154417/64074397830.pdfIn PDF document text
    • https://s3.amazonaws.com/tekujel/52632609675.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf2c1fa04221c71e5f345/1606283970129/48753196510.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1c02d6609fd0ee7976524/t/5fc8a79b6652ad59ec2e1880/1606985628636/tiny_house_builders_south_florida.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/zudugijutugakezodapa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dbca2e537a05ef08df7c/t/5fc34e703c6ccf69f3c88684/1606635120327/reglement_uno_extreme.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/apc_back-ups_ns_1250_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/avast_uninstall_program.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_off0000c612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC612 5000 bytes
SHA-256: cb9eef412b8819080200e5dca38c7e08b995ea107a5c46a7cd4c806d4d04a13f
font_01_sfnt_off0000d733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD733 9680 bytes
SHA-256: 2cf1ae44b66008f5585f3ed2efa8a0986e981d1d6fcc01f4ae31a91b9800cf17

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