Malicious PDF — malware analysis report

Static analysis result for SHA-256 51bb056ac12af3e8…

MALICIOUS

PDF

72.5 KB Created: 2020-12-22 17:41:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4214b1007a8e45eb959aaffec89abd98 SHA-1: 1ff6eeab9c4c7da977a1590c3f7a4bcbd4e93481 SHA-256: 51bb056ac12af3e85da8eb33cdb580af6fd8224b9bd0748196a229fa8f11bcb3
96 Risk Score

Malware Insights

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

The sample is a PDF document that contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware download site. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall detection suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/strik?utm_term=samsung+level+u+wireless+headphones+price+in+dubai
    • https://jelosixonov.weebly.com/uploads/1/3/4/6/134666827/6206984.pdf
    • https://cdn-cms.f-static.net/uploads/4404975/normal_5fb439d67ec2b.pdf
    • https://cdn-cms.f-static.net/uploads/4373264/normal_5fa74f0d7ab47.pdf
    • https://cdn-cms.f-static.net/uploads/4446027/normal_5f9e939c28f0d.pdf
    • https://rozapalevode.weebly.com/uploads/1/3/4/7/134705228/6734205.pdf
    • https://cdn-cms.f-static.net/uploads/4380881/normal_5f9c04c2b377f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/legesiliv/6661059242.pdf
    • https://static1.squarespace.com/static/5fdc79b839866a15ab3def02/t/5fdcbe3c27227574fbba2c82/1608302140462/ableton_live_9_suite_plugins.pdf
    • https://uploads.strikinglycdn.com/files/0a0d0da1-c0c2-4841-a360-e7c70aa97f1f/tajivusuvef.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe009da97599144ebdfd87/1606287518579/64774265012.pdf
    • https://uploads.strikinglycdn.com/files/aea3965e-dcb0-4a98-92b5-6be284fc2a48/convertir_coordenadas_geograficas_a.pdf
    • https://uploads.strikinglycdn.com/files/88a3a211-a845-453c-b2df-6c03293974ad/82644818488.pdf
    • https://static1.squarespace.com/static/5fdd458912e20d66685e56d5/t/5fde3fdca3b92b153c1d0e15/1608400860726/chips_full_movie_2017.pdf
    • https://uploads.strikinglycdn.com/files/03ffc2d5-a9e7-4c03-9936-3954d7eff597/46144384175.pdf
    • https://s3.amazonaws.com/kudufigunabi/beginners_guide_to_dslr_photography_book.pdf
    • https://static1.squarespace.com/static/5fc11c6aec917750a3d920aa/t/5fc89de0bbb7f45a928ed07c/1606983138173/11706710893.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc2a.bin
7e7399cd39c359e34d03ed40311d579fbd7a7edd8eaea653c6f8141877668137
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2A 5880 bytes
font_01_sfnt_off0000f00e.bin
f6e834099a3902a8859efe97116c0780f3a25a218ad3a6e9f6c16f69e2253e00
pdf-font-stream PDF embedded font (sfnt) at offset 0xF00E 10836 bytes