Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7f057d9c8b53323…

MALICIOUS

PDF

77.9 KB Created: 2020-12-22 05:11:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5797deabd3b047c9b527667f26edc70b SHA-1: 9d76dc19f21bbe7d53e536f01cac607022a2619d SHA-256: c7f057d9c8b53323bc8a8533c55587374e5e34911f49cd3d67cf0b04d8a0c9e5
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 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/aws?utm_term=goat+herders+guide+to+the+universe PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445573/normal_5fe132c9e1aaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457298/normal_5fc1156d262a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462351/normal_5fdbfca614afb.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://static1.squarespace.com/static/5fbfb2312cf09257bd651d14/t/5fc137e62dd96f59181ba386/1606498279906/bill_callahan_football_family.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc187916609fd0ee795caa4/t/5fc3abcccb3e0f5771c0451e/1606659020953/salufaxukaduja.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/icelandic_mountain_guides_sales_lodge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0d548b2-2558-4383-87f0-aeffee2f48ab/3505062321.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/557f66a2-f70d-4e9f-a201-6792f4a7c4fb/philosophy_of_education_for_school_counselor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a7ddadb-049c-45f3-b014-a947aed2004e/36587487864.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/377174a9-605a-4239-bac3-03ff48c9f2f1/pupigozilalulasatemiminim.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_off0000e7c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C3 5028 bytes
SHA-256: 94950373749b9f8287b582392c9dffb4c1ab32175387f76dc696e1f90f226a00
font_01_sfnt_off0000f8e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E1 10612 bytes
SHA-256: b292bde2ab5d17c94d8eeaf3e4f8def73fd34d65a154624f49d05a6f3a32556b
font_02_sfnt_off00011d23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D23 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f