Malicious PDF — malware analysis report

Static analysis result for SHA-256 aca7b01d2130c599…

MALICIOUS

PDF

89.9 KB Created: 2021-01-01 19:55:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 17ddc2c38ac82185e344dbcacd036f5b SHA-1: 79fa7ebe056c0bb7de8f9625d94b937c05ffb3dc SHA-256: aca7b01d2130c59945bfb774dfc443dd1e9ad078f65adb6e3a1794e44f6d0075
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=persona+5+missed+temperance+confidant PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5f9606559e9be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505363/normal_5fc0a74a5bd13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413848/normal_5fad27148f938.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b5cbc60-00e8-4236-907e-d20b02d5fe28/suwoxijulusepisalo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8e1d80d-b912-4675-b668-6f73e0071d7f/33215954684.pdfIn PDF document text
    • https://s3.amazonaws.com/musokejixami/3308772702.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce953c93-7fdd-4f84-8911-2bd3598977b8/xexafaluwimedaxozironej.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/31010911814.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/leatherworking_guide_classic_wowhead.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de3f7976-8187-4161-84f5-35863c548648/nest_doorbell_installation_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/cryogenic_engine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05e9f487-59af-4412-972d-78b8ba539684/strand_theater_delaware_ohio_showtimes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0598e59-2247-4b60-bcd3-1e33def50ef7/91345873998.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC93 4108 bytes
SHA-256: ac8d39b3e56f9072a10ed791408583c13e8d7fb4bdfdf55d5f57453663aa536d
font_01_sfnt_off00010b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5A 5392 bytes
SHA-256: 79a51a45492e0b5f38ff11c962a561b8f909aaa9bf4a35b502affa662a6a81f5
font_02_sfnt_off00011da3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA3 11580 bytes
SHA-256: fdd65f5598d89b500994c925b61abd438924a1082ec5224f08f7a06ea6f7482d
font_03_sfnt_off00014468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14468 16204 bytes
SHA-256: abfd345a6ea1e62b83e5b81470e97c0bb38d81b9d626d8407e597eb2d2192f0c

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