Malicious PDF — malware analysis report

Static analysis result for SHA-256 cac9be95980ed8da…

MALICIOUS

PDF

33.5 KB Created: 2020-10-30 13:14:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98656c9023c8f9673bf8ddb69bba8845 SHA-1: d7560f09b14a6f239cca705be2a51843150d9105 SHA-256: cac9be95980ed8da93c7095bfcfc68b50720ab15c63bd5980d1f68ab5521a43e
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a strong indicator of a phishing or malware distribution attempt. The document body text, though partially garbled, includes the phrase 'out of the abyss 5e pdf', likely serving as a lure. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ttraff.me/123?keyword=out+of+the+abyss+5e+pdf
    • https://cdn-cms.f-static.net/uploads/4411932/normal_5f99e12368473.pdf
    • https://gewosawoma.weebly.com/uploads/1/3/0/7/130739201/7e3102863.pdf
    • https://paseboke.weebly.com/uploads/1/3/4/4/134432883/7ed4f811bf3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kasuwevovog/kabbalah_meditation.pdf
    • https://uploads.strikinglycdn.com/files/01e02341-0d2b-4c1b-ba03-39610960a34a/hearthstone_witchwood_guide_toki.pdf
    • https://uploads.strikinglycdn.com/files/365d8226-a178-4a13-8002-c1b1f4816808/38483377447.pdf
    • https://s3.amazonaws.com/nerugiraxura/14738813444.pdf
    • https://uploads.strikinglycdn.com/files/a407f13b-4cf0-4acb-97f4-61eccaa93026/81281754194.pdf
    • https://uploads.strikinglycdn.com/files/49749479-5d09-4c38-b6a4-b5731b8bbc93/82394475010.pdf
    • https://cdn.shopify.com/s/files/1/0429/8699/5863/files/92733080948.pdf
    • https://s3.amazonaws.com/fosawef/gw2_hope_4_guide.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004401.bin
440b3a6247b8cb02832944364aaaa990625f43285d6c9be45dacfdd72dec97ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4401 5392 bytes
font_01_sfnt_off0000565c.bin
aa91d5fcc0eed89749efcf1eae6637e2807fd83691229e9fcec02b654e3aebac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x565C 10396 bytes

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