Malicious PDF — malware analysis report

Static analysis result for SHA-256 add568a9abb1756f…

MALICIOUS

PDF

37.7 KB Created: 2020-11-05 08:39:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 199d403aa147f9f98a37cde1178a294d SHA-1: da0ddb282fdc76e54eb8a9361725ced2d293f1e4 SHA-256: add568a9abb1756fab1a443c22ab650bf73cdbbecc46603d77d1539bde193b1c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves directing users to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cctraff.ru/aws?keyword=bsa+life+to+eagle+guidelines
    • https://garagagu.weebly.com/uploads/1/3/4/3/134364865/nijotet-jisazuzixel-nabasisiroleka-vawiw.pdf
    • https://dosaremuxabibi.weebly.com/uploads/1/3/0/7/130739916/e74ce.pdf
    • https://zelapagetuwuj.weebly.com/uploads/1/3/1/4/131406140/gisosovija_pojenelojotimor_gerip.pdf
    • https://faxipanonuk.weebly.com/uploads/1/3/4/3/134352952/nokufejadigom.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ce0bfd15-4138-475f-8ec6-355f75410d6b/lopulovomuvojibitupo.pdf
    • https://s3.amazonaws.com/wilugugo/barriers_to_communication_in_educational_management.pdf
    • https://s3.amazonaws.com/fatikonavori/zufofusu.pdf
    • https://uploads.strikinglycdn.com/files/2dbebe74-be28-4743-80b4-6e661cfe3281/michael_myers_jumpsuit_2018.pdf
    • https://s3.amazonaws.com/zetare/78620815814.pdf
    • https://uploads.strikinglycdn.com/files/3d705c7e-e2ee-46e6-831a-259f6ad41135/84180343545.pdf
    • https://s3.amazonaws.com/xezonijida/barney_oh_brother_shes_my_sister_vhs.pdf
    • https://uploads.strikinglycdn.com/files/84ff0985-a79d-4a01-8b8f-c5dff7d7d69b/fejogudixolaloxodekesedin.pdf
    • https://s3.amazonaws.com/pujirageg/nudomudapewuvokeneb.pdf
    • https://s3.amazonaws.com/xuzed/head_soccer_2v2.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_off00005725.bin
0fd9b97ac824dab6bbe100d9258110b9c67bee972522f65980e4b5536d0afd5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5725 5028 bytes
font_01_sfnt_off0000685a.bin
caca6668e314deeb446fd253f7e66825b26589fe3efd8abbbfbf6e70fc785dfe
pdf-font-stream PDF embedded font (sfnt) at offset 0x685A 9856 bytes