Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d1e19f0b2664151…

MALICIOUS

PDF

82.4 KB Created: 2020-12-14 16:07:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 19f40519fa8d3be8c6e97b4abdd03bc8 SHA-1: 83785fe1f8a3dee4e18cfa4106ab0d77c1d2405a SHA-256: 9d1e19f0b26641512db47f86b9027d9671db50cf2973fed3d9a445284c14e145
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 identified as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, which is likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, appears to contain keywords related to online games, suggesting a lure tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafficel.ru/123?utm_term=slither.io+unblocked+games+66+ez PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489993/normal_5fd6f95d43c04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368962/normal_5fd72cd455567.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448746/normal_5fbae37c43f97.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/9271a685-577f-4309-ab47-232ea08d3102/vavomekosu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac5000b1-cc2d-4dfd-bdeb-624fc8d40312/37445144119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6c85588-dc0d-4112-9e42-35ed0b658e07/javosirowigofozak.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf2bdc7afe470b55578e5/1606218437680/bunozodukadumupibam.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce6ba8564f736a5832ea25/t/5fd5f5b1ab1a676c7283126d/1607857585650/17567863427.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/annual_leave_calculation_excel_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd66fc94-573d-435b-bf8d-22f766d8928f/protoss_build_order_winter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41378961-5505-4fc0-8880-38736c985b7b/24419118822.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3024bca0-9638-4333-ad0f-10406e5815cb/neveroxudizudujul.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE162 5776 bytes
SHA-256: 368e1a219ab5cc99e188d19effa37fecfb6d5ef0be1054da20ea7ad9dfc355df
font_01_sfnt_off0000f4df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DF 10716 bytes
SHA-256: 7d8a49122f53ba6ab2cf35afd92677a4e7bd396a5738dc181c33aed35e292107
font_02_sfnt_off000118f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F9 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e
font_03_sfnt_off00012e29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E29 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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