Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d126336923abf7d…

MALICIOUS

PDF

81.3 KB Created: 2021-06-09 00:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 2f78d2cbbd11eaea81a9bbe51079df83 SHA-1: 53890d8b498f4c21f33997fbcad5925a183053f3 SHA-256: 2d126336923abf7de999550739dab160675bd12eb8a494274e3c7394b41cba6d
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 'queure.ru', which is likely the primary distribution point for the malicious content. The document body, though heavily obfuscated, suggests a lure related to 'moonlight sonata 3 sheet music'. No scripts were extracted, but the PDF structure itself facilitated the embedding of the malicious URI.

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://queure.ru/pbw?utm_term=moonlight+sonata+3+sheet+music PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416510/normal_5fe55c6bd11a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411480/normal_6004b4fb2b760.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394072/normal_60bccb1a4ffa5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391305/normal_5fe137638090e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459036/normal_5fc663a60574d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445534/normal_6041ebd75b86f.pdfIn PDF document text
    • https://gisafonenum.weebly.com/uploads/1/3/5/3/135323636/xelafapu_xarezewabuteve_likosapexife_fogala.pdfIn PDF document text
    • https://zutiwijutorezaz.weebly.com/uploads/1/3/4/3/134354078/502bf00cd8a.pdfIn PDF document text
    • https://mesovozilepako.weebly.com/uploads/1/3/4/5/134588792/5112384.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494417/normal_5fe8e024b3495.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/d3871bb0-a7e3-41ef-9e24-f0e75ac446e6/manual_kenmore_600_series_washer.pdfIn PDF document text
    • http://nomebazeregi.pbworks.com/f/tifavonifulurosojusewoleb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61abc387-894a-4a83-b3de-3e28abe78a9e/mevikinunuzinaxejubimoxu.pdfIn PDF document text
    • http://favakiwosut.pbworks.com/f/vidmate_apps_x.pdfIn PDF document text
    • http://lipadune.pbworks.com/w/file/fetch/144412566/bijevuxazusedijurinifow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a5bd3fb-d4da-4a7f-8bf8-f625daf24092/muvokumegafitupepasar.pdfIn PDF document text
    • http://javefanudosa.pbworks.com/f/wugomaduvevatorakegedi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93ca3618-68e2-433c-9ffe-ad5692e8ca60/linksys_ac1200_usb_adapter_range.pdfIn PDF document text
    • http://sinorodolu.pbworks.com/w/file/fetch/144459819/55921338448.pdfIn PDF document text
    • http://xanosisa.pbworks.com/w/file/fetch/144812619/80877272548.pdfIn PDF document text
    • http://ridelox.pbworks.com/w/file/fetch/144476730/kabir_singh_song_download_mp3_pagalworld.pdfIn PDF document text
    • http://moletose.pbworks.com/f/watch_peaky_blinders_online_123movies.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_off0000f259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF259 5168 bytes
SHA-256: 4b59f6c7ec9b8e679f37f6938bbf3c542b94ada82a05a602e60d507ef5f372a5
font_01_sfnt_off000103cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CC 11008 bytes
SHA-256: 6bfc3f520a0526b8063b923ea82605a6549862d0f28add3aa7d71cbcf72a0889
font_02_sfnt_off00012962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12962 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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