Malicious PDF — malware analysis report

Static analysis result for SHA-256 8729e1b10ae3a0a4…

MALICIOUS

PDF

62.5 KB Created: 2020-12-17 18:57:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d8215a54c2d2c973a4aa3e1aa0fb1f64 SHA-1: b6a1a559eb2caa3a1e097081aead85b186f55a54 SHA-256: 8729e1b10ae3a0a407869e588d23485360694e21f454096f17d8877c7b069351
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'traffset.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests it is a PDF document, and the presence of embedded artifacts and heuristics related to PDF structure further supports this. No scripts were extracted, but the overall context points to a malicious PDF used for initial compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffset.ru/123?utm_term=discriminacion+de+precios+de+segundo+grado PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4487431/normal_5fc5bd24552e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406191/normal_5f994b81e7a1b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc2d321f9866f3fd2e0c591/t/5fc5ebd7173fb5383b6ff499/1606806490946/janowefawenawuvak.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/beginners_guide_to_deep_sea_fishing.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/jekuranupoposokove.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e627116eb00e3c4beed8/t/5fc12e5908845d0924b50a0f/1606495833386/davenisugimitudosa.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/avg_pro_apk_full_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/destroy_all_humans_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/86499623792.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5349e3dfdd95b60f1467b/t/5fd672dd154d727871ee1f56/1607889634895/edmodo_for_macbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/066997d0-1824-4a39-bb7c-45e31a71c757/descargar_gratis_musica_de_los_rehen.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_off0000b56c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB56C 5360 bytes
SHA-256: d6936663854d39189dba9ca674269ea391aad6804a3c9828e4e00e5426eb98f7
font_01_sfnt_off0000c796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC796 11016 bytes
SHA-256: 105492cf0b3cea30567d734296cfe78934077341ea747e6bdd28f6f9bd02dbec