Malicious PDF — malware analysis report

Static analysis result for SHA-256 8372ba4944752a18…

MALICIOUS

PDF

75.3 KB Created: 2021-01-04 19:54:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ada563792a284135ceeec61bcba72afd SHA-1: 520c6044d9c4aa1dd9c62ca7bc3197dfddd44ceb SHA-256: 8372ba4944752a18bd096df435f6bd8b3e68d3c2a93fddfcba9d5e350b30e86d
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'trafficel.ru', which is likely used to host a malicious payload or redirect to a phishing site. The document body, though heavily obfuscated, appears to be a lure related to the water cycle.

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://trafficel.ru/123?utm_term=fases+del+ciclo+del+agua+en+orden PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369493/normal_5fce3f44848f9.pdfIn PDF document text
    • https://cdn.sqhk.co/lapefuxolu/jeUHZih/zigex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415937/normal_5fbc055a3a39a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475997/normal_5fc11b0a5916b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393359/normal_5fb2ce352bab8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426418/normal_5fe0430ae47a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461245/normal_5fd15899f3186.pdfIn PDF document text
    • https://cdn.sqhk.co/zebusukef/iaigDgg/10003712148.pdfIn PDF document text
    • https://galanutix.weebly.com/uploads/1/3/4/5/134591813/gokusiledif_wagaxe_lojusekuwunex_maxologil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe021f68-6b79-4116-936e-f84ddc9d5da4/29784073225.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33b7c0d9-d647-4562-9bb7-e60f6c7d3a8a/90930346386.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/snakemake_bug_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f2475d4-1c03-4633-adac-f16b329bb95e/77778834700.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_off0000e825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE825 5060 bytes
SHA-256: f08c373db3992b2cef06d7816318db88f10ca45851d67c0a28b117962ec84670
font_01_sfnt_off0000f968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF968 11544 bytes
SHA-256: da571f2da10ea72b0c38df05af28bb623ea5fb2717f003ae61105ee230e750ed