Malicious PDF — malware analysis report

Static analysis result for SHA-256 01c01bf753dafc86…

MALICIOUS

PDF

78.3 KB Created: 2021-02-26 12:42:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 350d92450992f0315d58793a1edcea9c SHA-1: 6f6895563250984a041d623efe372eddc55f1ce6 SHA-256: 01c01bf753dafc86dcb81b26aa501736bf001db5cbc393ccc3764a2541c3046c
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 a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to a song title, which is common in phishing campaigns.

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://kuzutuzo.ru/wix?keyword=una+ni%25C3%25B1era+a+prueba+de+balas+cancion PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4499942/normal_5fdc86e93a41d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421783/normal_600a3b0e03e0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459469/normal_602c4ba431713.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446646/normal_6032602ebac15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418575/normal_5fe90f6b7fab1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372074/normal_600dc09ba8d1b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369185/normal_6005167baeabc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446651/normal_6023d1c641fbc.pdfIn PDF document text
    • http://8gusevshop.website/is_clay_leaving_seal_team_cast_2020sdvo2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501028/normal_5fd1a11e61d3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386851/normal_6038545990294.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402953/normal_6026c0f888d32.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428334/normal_6006146e9b4ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477626/normal_5fd2fb142ac33.pdfIn PDF document text
    • http://uplrezina.site/limajagz3in.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380691/normal_5fe1c98117695.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473971/normal_5ff6774f4516f.pdfIn PDF document text
    • http://idealica-it.website/bopaviwabunugobebepipl0k1k.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/jevopemosod/disciplinary_letter_templates_free.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_off0000f242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF242 5408 bytes
SHA-256: 3ff8a37628b279c43709a6b441b899efba4bee2216754b5e71961b4eccb64e64
font_01_sfnt_off0001046c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046C 11440 bytes
SHA-256: 284a812ec3d95deada3baa30c80d828707e87f5fa7663378f586068c806789d9

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