Malicious PDF — malware analysis report

Static analysis result for SHA-256 6747e04dcbc172f8…

MALICIOUS

PDF

97.6 KB Created: 2021-06-11 09:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7ced14cc1f5c441fbb01953bede32c41 SHA-1: 8f065b7cc53b8f6d856cb8107d4e1f68af682cae SHA-256: 6747e04dcbc172f82dfa30d9ab22b4f00d9c31179319f1c2e0239574c4dbf48d
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain, identified by heuristics as a potential phishing or malware distribution vector. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://laborke.ru/pbw?utm_term=free+ae+logo+reveal PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421207/normal_5fdd760b9c876.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454990/normal_60146c8b530b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471683/normal_604eaf7d92cbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393635/normal_5fe73fe7b51bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391037/normal_603d46b087189.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/6d766529-3409-4403-b5b7-eeb2ae40860e/80414986962.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5d8bd1a-8c6b-4c73-825e-a9c263c4de27/midutiwizedabizase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/852b9178-4e3e-44ca-b6df-9f0ad26643fc/how_to_add_bluetooth_keyboard_to_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f0e8218-71b6-4383-b5d8-edfc229abfa5/taper_turning_process_in_lathe_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dd3018a-c9fc-429e-aab3-4e0253f75fb7/bissell_cleanview_complete_rewind_pet_vacuum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45664e81-383b-42b6-a574-66183e11e0cf/41663239867.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2b971e3-18b5-4a29-bc6a-721c164d56e2/mo_boating_license_test_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c129e262-c655-419e-8091-e01cf4fb9d6b/14433834298.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d61270bd-c852-4657-93e3-1136bc9acaa3/zekafamagilodiwovibi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56b8dd24-c02b-402b-b61a-2936bc181fbe/mixcraft_8_free_download_utorrent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a351afd6-8e83-4f32-bfc5-c7c2ac63406e/laxodilexoketoxabebonem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a27860a8-504a-4afc-b3e2-51a09e1a9211/15652282261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d4d768f-26e7-4857-88a2-e85459a84a13/dikakidubixokosomem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6979a64a-3855-4546-9b61-d2e1c094a57e/polytropic_process_and_adiabatic_process.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06b37ec0-0faf-44e3-9805-c6e7e95eaad9/dewalt_circular_saw_dust_collection.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30683eef-9578-496b-a6e2-fd79090447bd/do_you_capitalize_special_education_teacher.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12833 3352 bytes
SHA-256: ccf9fb892202b4bb2088ce8142a4053323d469e40edb26319e9635fab615566c
font_01_sfnt_off00013433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13433 4244 bytes
SHA-256: 6c3d79f59a187d3f0c8aea4d5496cbc366a58831b758493f2fcb8c47ba7bbe9a
font_02_sfnt_off000142aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142AA 11680 bytes
SHA-256: a4daf24bf200760774322758000aaf3c24ee11dc8e24d294d4606d3580561073
font_03_sfnt_off000168a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168A9 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361