Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5680c933937a4cc…

MALICIOUS

PDF

83.3 KB Created: 2020-12-30 22:43:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1d3d3ebb29c40fc4fefe99690208fc5f SHA-1: f902224a67aeb6f53b37eee0e528d55459b8c18a SHA-256: a5680c933937a4ccbfb1840113d9e48211b74a50c9b7cdcfdd1ca63b932ee408
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, which points to a suspicious domain. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The embedded URL is the primary indicator of compromise, suggesting the document is a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffe.ru/123?utm_term=before+the+flood+movie+discussion+worksheet+answers+pdf PDF link annotation
    • https://zewabezasakaru.weebly.com/uploads/1/3/4/5/134593707/1374878.pdfIn PDF document text
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/migobolufek_tabomujezer_kabexetilujakeg_damet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449769/normal_5fae368edc406.pdfIn PDF document text
    • https://bakubirusi.weebly.com/uploads/1/3/4/6/134680497/kawifuxudakiwas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409255/normal_5fb4a87621ebb.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/ab3bf35e-3dca-4244-a6be-511f46d3a61e/jizovinuwewixomavep.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/visual_c_2010_x86.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93093c91-cd17-4992-aee8-7dffe51a7864/rice_cooker_aroma_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1da2b000-d305-45df-843b-aa20351ed02b/61475662435.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_off0000fb77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB77 5544 bytes
SHA-256: c335d4c194eb829bc720913b5efec8154cf646021bd2669450f6b3c0dda89a81
font_01_sfnt_off00010e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E44 10472 bytes
SHA-256: abc393b8b2255216b2b2f2132fd7fe8c5258100acbb246851927c7c5da5c9007
font_02_sfnt_off0001322a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1322A 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e