Malicious PDF — malware analysis report

Static analysis result for SHA-256 c03a8744d938c535…

MALICIOUS

PDF

64.5 KB Created: 2020-11-21 06:45:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a83be69647e78c4cd0eb7be4f987fec1 SHA-1: b5bff93bb3132d090e999c717127f4151eab4e36 SHA-256: c03a8744d938c5358878cb26cce08365f7483662eea720b27d6373ce700b7670
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafftec.ru/123?utm_term=mount+vernon+wrestling+roster PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385020/normal_5f968253887ab.pdfIn PDF document text
    • https://dojenamolusojow.weebly.com/uploads/1/3/4/8/134868247/1d40477.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372073/normal_5f8f5e496ba59.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/xovajukoxin/antareja_antasena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b9025d4-6448-4cff-8c8c-cd4fa4621686/56673291632.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/ahsan_ul_bayan_urdu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22be053b-6be3-4a8a-b8c8-5be9744a2fdd/cpam_13_contact.pdfIn PDF document text
    • https://s3.amazonaws.com/lopazura/47659699006.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb255620-ea71-4e4d-801b-d3a42dde862d/on_the_run_miniclip_game_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88a303d5-bfaf-4479-b436-01d80f479cc3/56119278217.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/wodip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e038a4aa-8d38-488f-a90c-bb54001c761a/38210795752.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_off0000c174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC174 4800 bytes
SHA-256: 396af09226636ab425ebcb626c1ba2f50e531ee467b05a6efb81a92b3f7c7e7e
font_01_sfnt_off0000d1f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F9 10528 bytes
SHA-256: ab33ff33e31ecc63a34a5fede8073f2892d1bbccbcb873ce96bfec482be246e7