Malicious PDF — malware analysis report

Static analysis result for SHA-256 e792f2c7203d97b3…

MALICIOUS

PDF

77.1 KB Created: 2020-12-28 05:50:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a971950d5c52cf65af53710369d1a83a SHA-1: dd9e102bb892ad2d915cf820c2b1527a0f805575 SHA-256: e792f2c7203d97b3c0cf0ec99b7a8c7135a77dc6788862d52edc5b33ce495b26
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded URLs pointing to suspicious domains, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains strings that appear to be part of a lure, possibly related to educational content, to trick users into visiting the external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/123?utm_term=first+grade+webquests PDF link annotation
    • https://nemulokisen.weebly.com/uploads/1/3/4/4/134492012/8854803.pdfIn PDF document text
    • https://mimudokax.weebly.com/uploads/1/3/4/7/134742140/wazazoze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468536/normal_5fc1c8b5985fb.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/wijigomofiweb_lotitosede_jukis_dirum.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/3665246.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/organisme_de_formation_cpf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8867c8c-e7fd-4237-a24b-705801e82e0d/pedelasodumuxuvizepesa.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/free_blank_weekly_schedule_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a3f0f3f-3cc2-4501-854c-b94fbb0ee7f7/66403705933.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/83476211991.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/280ddf69-0ab4-4211-bb93-9bea65a2e9d0/gogizitulimaloledutonot.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4E 5276 bytes
SHA-256: 7c4a443ba8b36a633ae8bfae119d00a2447e8110071ab7a19a2b29d02f64044a
font_01_sfnt_off0000ed56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED56 11032 bytes
SHA-256: 62c2ca4db0a8cdc69ce2baf6687d43ea1f6da39bbae963072aa70c50be0bc314
font_02_sfnt_off000112b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B2 16088 bytes
SHA-256: fff8b70d67420864e2a263fdbbaad35efae781e73a516d3cf38207748e8715b5

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