Malicious PDF — malware analysis report

Static analysis result for SHA-256 1031800c17ed5704…

MALICIOUS

PDF

69.6 KB Created: 2020-11-13 01:43:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 3bca49cc48ccbd4d0bfedcdd4a63ee38 SHA-1: 12463b60ee72ba6064cd310909d82a4f6bc0fcd4 SHA-256: 1031800c17ed5704381a4fd97a8a2f5a08a28fcf355ac381fdebbf1915b4bb70
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 0.9995

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://trafffe.ru/123?utm_term=mcgraw+hill+grade+9+math+textbook+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375194/normal_5f8d1f0056f56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478950/normal_5fa976d839418.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5f8be6130521d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381546/normal_5f9e03e094a7b.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://uploads.strikinglycdn.com/files/0a48b2e8-c15a-4025-bca8-2e3faeecb283/rowiwudujedigaw.pdfIn PDF document text
    • https://s3.amazonaws.com/takeju/96181739556.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/gorabe.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/algebra_2_ellipses_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/23916481635.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/chick_fil_a_calendar_card_june.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_off0000c537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC537 5600 bytes
SHA-256: 33d0f939967eeac1102ed16e7988cb65a6df3abf8451e2f44102cd060adb01aa
font_01_sfnt_off0000d860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD860 10324 bytes
SHA-256: ba9b0167149507467aa051452abc180aa098b8a506ae92ea590f74166118240f
font_02_sfnt_off0000fbc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC0 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f