Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e5842b79db600ee…

MALICIOUS

PDF

80.1 KB Created: 2020-11-18 01:34:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ecb5fff637a98577c37fff40f88d687d SHA-1: d4ec6d3fc2110fb33ffbe66d9f80d88134888ba9 SHA-256: 9e5842b79db600eeaceb21bb3694fc9bdd6230b9c417fad17abeb1853e1f87d2
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, traffset.ru. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, suggests a lure related to 'literature and the writing process pdf', likely intended to trick users into visiting the malicious URL. No scripts were extracted, but the presence of external URIs and the overall detection profile suggest a phishing or malware distribution attempt.

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://traffset.ru/123?utm_term=literature+and+the+writing+process+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4394066/normal_5f9f99040c148.pdfIn PDF document text
    • https://rabexowubomisuw.weebly.com/uploads/1/3/1/4/131407155/1a05853083a2a.pdfIn PDF document text
    • https://terifurarogo.weebly.com/uploads/1/3/4/3/134317228/pujoride.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450732/normal_5fa750a65e62d.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/3223709c-013a-4ee7-adab-7179102e6fa6/ruvete.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/39808486948.pdfIn PDF document text
    • https://s3.amazonaws.com/fasotajedag/westward_expansion_journals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f90f992d-584a-40b8-bd6a-30afae253f47/duzata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b8a4d59-3453-4dd2-8817-7e4ddd0638d2/loramimasetitexedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddcbee69-291b-4853-a958-c61744b8a14a/anger_management_completion_certificate.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_off0000f95c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95C 5420 bytes
SHA-256: ac797c6ea5a7b6c0725b22fe371405655196c5d19bc07957bd571fda6c4a2fcb
font_01_sfnt_off00010be1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE1 12804 bytes
SHA-256: 9c00a54051516f05338e7d19eafe03a0c03922a0c04711557064d4979acef868