Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6cdb3941b74c74f…

MALICIOUS

PDF

86.6 KB Created: 2020-11-13 15:53:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: dbd8fff868b4f063f958d15353e8b47e SHA-1: 37c3ae1ecb0cb3f166c3847e5a39e2863459bb96 SHA-256: f6cdb3941b74c74f8bfc9ef3cb50b8137825495940ed66689d69b0f5542479f4
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and was flagged by a machine learning classifier and ClamAV as malicious. The document body, though heavily obfuscated, appears to reference event tickets, suggesting a phishing lure. The embedded URL likely leads to a second-stage payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffine.ru/aws?utm_term=bseap+hall+tickets+2019++ssc In PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/2122744.pdfIn PDF document text
    • https://rawiranuxox.weebly.com/uploads/1/3/4/6/134618620/nezuzat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379982/normal_5f8c86ab2c8c3.pdfIn PDF document text
    • https://jiluzeros.weebly.com/uploads/1/3/4/3/134365673/newuvobigego_vetobelovax_rawumoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367313/normal_5f875bd7176c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386830/normal_5f9080833259a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374545/normal_5f989f5da2bec.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/9051060.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379046/normal_5f9a888fa5461.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a0238599-2672-4dba-9810-14e1a5c2521f/67389276524.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf7f98e5-0dbf-4209-a374-3e491e5edd76/operating_system_concepts_7th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93836c7b-d3c2-4a0d-9b31-1ac2ed4afd3e/maridopagokilivemetakobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04b14b8a-833e-4bb4-a0d4-393c81315d46/bigukalisibokedin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c78c9f9c-23af-4b03-adf2-c1b6fe1f2a16/21539524072.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff3aef16-bb03-46fb-bfc0-c6d711f1edee/magnus_chase_book_3.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001135a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1135A 25536 bytes
SHA-256: d841c04ed94884d81072d88711bc2ac0e461119b14fcdc3cfa69ffc119145465
font_00_sfnt_off0000dd35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD35 5092 bytes
SHA-256: c78e6f210b7cb860caca12672d8355d52731e67a18c78fcdafc8470f6416d33d
font_01_sfnt_off0000ee8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8C 10688 bytes
SHA-256: a689336299641bd886da3daa80daa658809d47a72eda2692c9a9388c665ab38b
font_03_sfnt_off00013e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E9C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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