Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a4c78aff12af3c6…

MALICIOUS

PDF

74.2 KB Created: 2021-02-21 17:26:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: fd5c62e33e49c8fc7e0b6dafee3bab40 SHA-1: fb669f4e772cb000629dee4050c98cd1a7eb862f SHA-256: 6a4c78aff12af3c68ceb9de96cb20d858086f38f331c6fc5b7526abcae9a4b2e
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to software updates.

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://bologen.ru/strik?utm_term=how+to+update+golf+buddy+platinum PDF link annotation
    • http://healthytrands.com/brewster_ma_weather_reportiigw3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494888/normal_5fddcfc36c9ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463010/normal_5ffd7c971c45a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426271/normal_602d62fe61894.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382201/normal_6018450cd25a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377113/normal_5fc6df35a6f09.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://s3.amazonaws.com/satudifin/zexajiwirewaveza.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/wosubabujujaxidibet.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/toxuf.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/destiny_2_blizzard_app_slow.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/baidu_browser_with_button_er._exe.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/30867789249.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/30373156187.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/soxulisuzomipodenekezi.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/57087844648.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/actas_constitutivas_de_una_empresa.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/64566393086.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_off0000d793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD793 5264 bytes
SHA-256: 5de72d4a63e526378ccbf3a4541e75935690b3ad941eef30877c7459fc0fc046
font_01_sfnt_off0000e97d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97D 10616 bytes
SHA-256: 2aee236752caef44119dd266380d1795244576e0043ae50a2e37eb3899ecaf66
font_02_sfnt_off00010de1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE1 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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