Malicious PDF — malware analysis report

Static analysis result for SHA-256 aed5c8d7cda71524…

MALICIOUS

PDF

497.4 KB Created: 2021-04-08 05:54:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 29fdeca63b56d8904594d31c8c8d7e27 SHA-1: 21d0b1b576fbc30fd347e58f2a83c75af25f6ed1 SHA-256: aed5c8d7cda71524211c1b15d7bef9fd1b2d30a9e0dd7ed0a4c6f99409dd0a65
104 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high-risk score. It contains an embedded URI pointing to a suspicious domain, which is a strong indicator of phishing or malware distribution. The presence of urgency language further supports a phishing pretext. No scripts were extracted, but the PDF structure and embedded URI are sufficient to infer a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8685

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://pelibifir.ru/strik?utm_term=artemis+fowl+the+opal+deception PDF link annotation
    • https://laximazerafa.weebly.com/uploads/1/3/4/2/134235816/7469344.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481291/normal_6039231c6a7db.pdfIn PDF document text
    • http://suvuxivenorum.mypressonline.com/54927084909.pdfIn PDF document text
    • http://tujukesabegakom.mygamesonline.org/dusupibogafobamobokil.pdfIn PDF document text
    • http://matteset-spon.space/ziniloxonoripvtsof.pdfIn PDF document text
    • http://monubagujizud.mywebcommunity.org/62649297278.pdfIn PDF document text
    • http://powerhdniy.space/english_speaking_practice_app_offlineca0gn.pdfIn PDF document text
    • http://damvglaz6.xyz/can_retired_ministers_claim_housing_allowanceq38ji.pdfIn PDF document text
    • https://sazadasixitabe.weebly.com/uploads/1/3/4/4/134404720/sobul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421639/normal_600e89b64b3a1.pdfIn PDF document text
    • http://pugisapi.mypressonline.com/68354711412.pdfIn PDF document text
    • https://fojumotapikapig.weebly.com/uploads/1/3/4/3/134372119/9485677.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
    • http://lewomunenuvi.myartsonline.com/luzubobizifebatafabawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51aa3c09-b055-4cb2-bedb-d3d5f9e5e6c2/9832543296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/691a5e9b-e9bd-4c93-b030-c6c04c04de85/apc_back_ups_es_750_silence_alarm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db882649-cec5-4de1-96b0-1385ff3ed81b/52025739305.pdfIn PDF document text
    • https://6f847715-c85a-45d9-ae5c-7c68cc800588.filesusr.com/ugd/6e100b_e44992da49624b6eae96c4ad5ab8be6d.pdf?index=trueIn PDF document text
    • https://113c517c-d7b0-4b36-99d7-6722bcb7ef36.filesusr.com/ugd/8e66a5_8a22fd8c9f254e5993256970549b4019.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6748e667-724f-49e6-bdb1-3adc86c44d12/kevovawanuruwusonuxegiber.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91ae322e-feb5-4eaa-98be-02ae04195941/how_much_is_a_2004_mustang_mach_1_worth.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_off00076c08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76C08 5264 bytes
SHA-256: 3e7d35acb3330a8d04703f56e1280818e679e6400c153da51b5b78d91604c617
font_01_sfnt_off00077dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77DCE 12720 bytes
SHA-256: a0942c0c157d2472a03231ac393709ad8e835d634d0604d4adbef9e1624ef7b3
font_02_sfnt_off0007a6e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6E2 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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