Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b1b8e7b56ea575d…

MALICIOUS

PDF

56.4 KB Created: 2020-11-02 04:03:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce2a18771fdbc764e9e83f9af6a13c77 SHA-1: 77fb708573da6f93874ef079e3e9e8209ec13493 SHA-256: 6b1b8e7b56ea575db00745965509f2bc7a70405ced632b11aa379602f0548c38
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a known malicious redirector and others forming a link farm. The ML classifier strongly indicated maliciousness. The embedded links likely serve to direct users to malicious sites, potentially for phishing or distributing further malware.

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://ttraff.com/123?keyword=mad+paradox+elsword
    • https://xebexusutawa.weebly.com/uploads/1/3/4/5/134502291/86a563dde17e608.pdf
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/30ad2548.pdf
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/zisokumuxotoxaz.pdf
    • https://fimuvuxufubewi.weebly.com/uploads/1/3/4/4/134442536/a03b6083ebde8.pdf
    • https://lanasasaf.weebly.com/uploads/1/3/0/8/130815311/lekuf.pdf
    • https://kexinebig.weebly.com/uploads/1/3/4/3/134338338/fefewivubenu.pdf
    • https://foxegakadop.weebly.com/uploads/1/3/4/3/134337736/08761ae1.pdf
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/8c42e885bf419f7.pdf
    • https://panirosarukiza.weebly.com/uploads/1/3/4/1/134132539/76fa72642aac14.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/nokiwovowus/world_of_tanks_blitz_download.pdf
    • https://s3.amazonaws.com/mawesenasijoser/3x3_system_of_equations_solver.pdf
    • https://uploads.strikinglycdn.com/files/e5681c0e-00c9-41cb-a9fe-26254a141e21/8503677976.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006da8.bin
8ca23299ee61a7d1701b9cc22a3089fd5621affcd15539557722a2e49ea8525d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA8 3548 bytes
font_01_sfnt_off00007a50.bin
a04326474aee6e9da2bf121870d9b8ab72257f90fdd5351e11469d2845525e00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A50 4672 bytes
font_02_sfnt_off00008a56.bin
1ffc123976effa81791cc7a758a3fc083cd2cf1351e608428edcbc20c4855b0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A56 10884 bytes
font_03_sfnt_off0000af9e.bin
9d161d6e34f835aff196e226d852edde4d65b072a4902c32411b177d8c29261e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF9E 16076 bytes
font_04_sfnt_off0000c442.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC442 4324 bytes

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