Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc4de8ad718d0105…

MALICIOUS

PDF

32.7 KB Created: 2020-11-04 22:45:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6c29647d358082e6d9a5e2aa88bb121 SHA-1: 376b9cec25db1125bbcf6abaafea9921b7099bc8 SHA-256: fc4de8ad718d0105a3fe26e04363986df5d7ec0aa78ec909d448ca9ba39b66c5
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 infrastructure, which is a strong indicator of malicious intent. The document body text, though partially obfuscated, includes the malicious URL and other URLs that likely serve as lures or further stages of the attack. 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://gettraff.ru/strik?keyword=loss+carryover+worksheet+2018
    • https://tifedufuzitiji.weebly.com/uploads/1/3/4/3/134353288/zejakiwukeloxe.pdf
    • https://pozimetotekiv.weebly.com/uploads/1/3/4/3/134339641/3253713.pdf
    • https://jadibezunapav.weebly.com/uploads/1/3/4/6/134610372/689e20e48.pdf
    • https://xufidevudog.weebly.com/uploads/1/3/4/3/134389214/e89ac.pdf
    • https://dosedupuwosiwoz.weebly.com/uploads/1/3/0/7/130776272/tinopiseliziwejo.pdf
    • https://voxapinave.weebly.com/uploads/1/3/2/7/132740917/tevonesumijix_bimujuzodaker.pdf
    • https://lavaseke.weebly.com/uploads/1/3/4/3/134383013/7816000.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/faluzotixupi/25883238994.pdf
    • https://uploads.strikinglycdn.com/files/126eb814-dc63-4393-8494-708cd31be829/42202503539.pdf
    • https://s3.amazonaws.com/zetare/bhagavad_gita_chapter_12.pdf
    • https://s3.amazonaws.com/sojaxub/sidumazenakupuruke.pdf
    • https://uploads.strikinglycdn.com/files/ad448d55-1d0b-4672-8056-d60c5dc6340f/94824280594.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_off00004323.bin
efd782ddf0c8ea4e2de41a2d058128a091ced30343e048a7b1e6d5603b710fcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4323 5632 bytes
font_01_sfnt_off0000566d.bin
978c16f4581d99f113b22e2c836a7fa3631456ddfcd96b0e01021c8e6cb1d0c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x566D 9376 bytes

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