Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c0f3416f0c67d8f…

MALICIOUS

PDF

76.9 KB Created: 2021-01-04 12:10:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 37819e6dba281375702a6af4a9070e80 SHA-1: e1ac846a257d06748a2586a56d78487caac1e260 SHA-256: 1c0f3416f0c67d8fa4bb02017d7aee5f03407e5f3223db7eb2db62205ac9a2bf
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URL pointing to 'traffnew.ru', which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to medical diagnostics.

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://traffnew.ru/aws?utm_term=cardiopatia+hipertensiva+diagnostico+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445337/normal_5fb2b319d05ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423154/normal_5f9b716d8e12d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454040/normal_5fe517f68c33a.pdfIn PDF document text
    • https://cdn.sqhk.co/sevafeluba/Siegehb/big_wine_glass_cougar_town.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499317/normal_5fe413bd7d2ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414864/normal_5fcdf84dc482f.pdfIn PDF document text
    • https://cdn.sqhk.co/lafugafeniki/bI1Xicu/xbox_series_x_memory_card_price_leak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419822/normal_5faa0f3e8c2e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368474/normal_5f8942df94f83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388608/normal_5fa9bd407d4fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503035/normal_5fc2ced0e7c22.pdfIn PDF document text
    • https://feminudusur.weebly.com/uploads/1/3/1/4/131407357/kolikapusej-jumuxovojila-pukutanag-fodux.pdfIn PDF document text
    • https://cdn.sqhk.co/vivupedasez/USNF3bB/navakowejamafa.pdfIn PDF document text
    • https://cdn.sqhk.co/maxevurux/jetCjay/nail_biting_disease.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/zekovibagodizo_jivilovexanova.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f0e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E5 5348 bytes
SHA-256: ce6d13276a0cd40ee50801c4b3cbd20ce5a52a3920e7380e291ee03417eab082
font_01_sfnt_off0001031a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031A 10736 bytes
SHA-256: 73fb52a17f00cbd22f1d13db800a01f6880137d6f8583a859cb40077d338265b