Malicious PDF — malware analysis report

Static analysis result for SHA-256 21c06d4b13d8251b…

MALICIOUS

PDF

83.0 KB Created: 2021-05-29 21:01:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 837567e5bd83f9abd644db2d6b663d24 SHA-1: 3cb5f6fb66771bc8b5f118ebb049ae0a9693a316 SHA-256: 21c06d4b13d8251b89acbd67348e7da994f6595f5c2ffb1b67ee63a006cb46c6
96 Risk Score

Malware Insights

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

The PDF file contains a lure related to 'Hardee's breakfast menu nutrition information' and embeds a URL pointing to a suspicious domain. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the embedded URI is a primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://golowaki.ru/123?utm_term=hardee%2527+s+breakfast+menu+nutrition+information PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4374848/normal_5fec4b273552f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428331/normal_602d3fad456bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419191/normal_606ad99a7bf2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476126/normal_6038812e9a375.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370744/normal_605ac470e5325.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408355/normal_5ff16dd43915f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465548/normal_5fc80bb3a69fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410217/normal_5ffe0079b49fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410678/normal_5fd04b1f79093.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493867/normal_6046a03a0e3d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370540/normal_5ff52bfa60055.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426063/normal_602517fcc8bc9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426957/normal_5fdfc77d1e00d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490528/normal_602e6ae26ce47.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/b8c45e9c-94df-4c25-bfb4-1f0b21b85619/35227244635.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fe4dcba-6451-467a-a918-0f44a92a7ac7/what_were_the_terms_of_the_treaty_of_paris_of_1783_and_how_did_it_help_establish_the_united_states.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/712bdb92-28f6-4a90-aee8-ae82366aad52/7804538073.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc0b18bb-53ef-4646-98fc-840ed309c63a/zugivugasepumelevefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d09f3f4c-6675-422c-a3f4-331e8b1c89cd/how_to_draw_a_furry_on_paper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20efad04-002a-4034-974d-04e05e78ec3c/honda_civic_2006_hybrid_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85eb1acf-ecb3-4673-a738-4f2f9987a6ac/troy_bilt_pony_carburetor_solenoid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5613a884-12d7-48f3-9d6b-3812a2617cc8/zapebovazabumalojufasaw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FA 5104 bytes
SHA-256: 1a95a7949376bf5b177a642182829891573217d123235fe806394bd7052fe045
font_01_sfnt_off00010b3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3E 10640 bytes
SHA-256: fc6aec19295f90b24ec11d65947a7bf3ee0772d192799d01b08f2dc77fa39b30
font_02_sfnt_off00012f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F9E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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