Malicious PDF — malware analysis report

Static analysis result for SHA-256 9357c15346cc7455…

MALICIOUS

PDF

76.5 KB Created: 2021-01-11 10:05:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8c8763da20b8337beb744aa12dfff9d6 SHA-1: 400bff5f1a38e572960cf875310b2e9bae37fb14 SHA-256: 9357c15346cc745512ed09e23ad24a4f6841555794dde80b6484f6456b0cffd2
96 Risk Score

Malware Insights

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

The file is a PDF identified as malicious by a ML classifier and ClamAV. It contains an embedded URI pointing to 'trafftec.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to 'Caspa en perros'. No scripts were extracted, but the PDF structure and embedded URI indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/aws?utm_term=caspa+en+perros+pdf PDF link annotation
    • https://site-1179780.mozfiles.com/files/1179780/33701583125.pdfIn PDF document text
    • https://cdn.sqhk.co/lofopapenow/RVqY0H4/89339455014.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/qsj8qha/pijosopodofumaw.pdfIn PDF document text
    • https://site-1217518.mozfiles.com/files/1217518/charlie_pride_sheet_music.pdfIn PDF document text
    • https://site-1206965.mozfiles.com/files/1206965/88671159211.pdfIn PDF document text
    • https://site-1178554.mozfiles.com/files/1178554/cyber_hunter_lite_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/manaruparil/pZijedh/zomejeduvunilutam.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://s3.amazonaws.com/vuzotisenixava/temporal_bone_dissection_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/mixodomet.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/44411411322.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/viputifogatowamarudubof.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/tneb_hall_ticket_link.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_off0000e17c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17C 4688 bytes
SHA-256: 4dfa17116ed0213c33dc2646e978c7e5e8dd7a2f042fec7f0e5b768a41bf7996
font_01_sfnt_off0000f164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF164 11260 bytes
SHA-256: 2c1fa8bf0888a32739a5f2e8f85e704580365a706258d1b5d5ab71046a15d6f0
font_02_sfnt_off000115bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115BD 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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