Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc7e4ce31dce1477…

MALICIOUS

PDF

77.2 KB Created: 2020-12-24 21:36:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f7af73d70eea129f03dc0034372d8dc3 SHA-1: 7729f8f5613596b3358573feb5961511e25342c6 SHA-256: fc7e4ce31dce14779152c5eca235073db30afd81fc97c438161db582d97c3777
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'trafficel.ru', which is likely used to deliver a secondary payload or redirect the user to a phishing site. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to exploit users through deceptive content.

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/123?utm_term=a+rainha+vermelha+pdf+gratis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381997/normal_5f963cd11fd3b.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvomuvugu/hFSBhi6/44127375371.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411944/normal_5fa896becce7a.pdfIn PDF document text
    • https://cdn.sqhk.co/femuzetoj/nggjx1b/thruxton_classic_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374021/normal_5fb95a154d6d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365635/normal_5f8c4cf9dcb31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447437/normal_5fd0da2b22c57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484118/normal_5fba17a555437.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/nakevoja/cat_mario_3_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/telugu_akademi_botany_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/jojuvixukik.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/somewhere_beyond_the_sea_sheet_music.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC33 5504 bytes
SHA-256: 4a3b12fe828be3c89551c9cc8eeab75cc4ff2b5168e5e617030ad842a9e257bf
font_01_sfnt_off0000eecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECF 10516 bytes
SHA-256: 1bbc1f0a49a29cb5b7c642475f1a0f1b48e85457acdb649cf2166170ebc39a7d
font_02_sfnt_off0001129d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129D 16204 bytes
SHA-256: 0318b400cbd4eb80818b7eb131bcca2e18f343f850c5eb1573e525fea31f4d56

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