Malicious PDF — malware analysis report

Static analysis result for SHA-256 1317f99a75832c72…

MALICIOUS

PDF

62.7 KB Created: 2020-11-21 17:16:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ae82c43be3247538b1eb4bb7aa51ff57 SHA-1: 44143db23ed54bf2dca2674219b6cc845adc3ace SHA-256: 1317f99a75832c7268fbe8ea4923058beb0bef863f037df9b0f6346aae245a19
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a critical ClamAV detection and a high ML score, indicating it is a phishing document. The embedded URL, 'https://traffine.ru/123?utm_term=r+kelly+album+free+download', is likely used to redirect users to malicious content. The document body, though heavily obfuscated, contains text related to 'Rkelly album free download', reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=r+kelly+album+free+download PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/16797201400.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f29632c-a164-40a1-899d-0238e1c4ee0a/68192155445.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7f5b3db-e06a-4678-a23f-47834fc7bfe8/dozenosezobomijotax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f9fbeda-34b0-42b0-bb54-413f66ca1a32/63936356365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6906eba3-92fd-4115-8c81-dbd8271c44e4/zerenamajebe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8903ed19-e569-4258-97cd-b111f2f64b7b/examen_diagnostico_de_ingles_tercero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18369189-58b6-4d78-9ad6-2100322a1054/xiweg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02f2584a-ab41-4851-bcbd-985513cee8e9/bejusokugoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fa77bbc-a9b3-4ae4-985a-423dfb0565ca/fuxepebafuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83b9683e-fbd4-479a-8b61-a561e342b618/sison.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0f0efc2-09bf-49a4-80a7-240f4a9eae56/vukanoturitopexagojuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da84a243-034e-4e5b-aa8b-84529506573d/geotechnical_engineering_principles_and_practices_2nd_edition_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb1055db-dacb-443a-a424-a4ba6f3ddc6b/free_hearthstone_packs_code.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/48667515858.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB880 5280 bytes
SHA-256: 2d1c02358ca59ee55e69ee5978ae26f64652f45efa9293107c85509270815672
font_01_sfnt_off0000ca7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA7D 10764 bytes
SHA-256: 89c428383e4e8758bd7d5fcc6518ab59d4947a439e33d92ab9f4bb007e51f6a4

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