Malicious PDF — malware analysis report

Static analysis result for SHA-256 be09d6a39debbe39…

MALICIOUS

PDF

44.6 KB Created: 2020-11-09 00:19:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7867bfcc8bd03ff67b0696dd32702cbf SHA-1: 794e0e5646e58b47510e737f6202a67d6924ff52 SHA-256: be09d6a39debbe3980fd225fc27acb08235f0798a1521e5724dc21414eaab6b6
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, though heavily obfuscated, contains the URL and keywords related to scholarships, suggesting a lure. The ML classifier also flagged this PDF as malicious 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://traffmen.ru/123?keyword=scholarships+2020+nc
    • https://cdn-cms.f-static.net/uploads/4367308/normal_5f876f282df35.pdf
    • https://cdn-cms.f-static.net/uploads/4370304/normal_5f9541c133543.pdf
    • https://mikezopa.weebly.com/uploads/1/3/4/3/134366842/sominusoxik.pdf
    • https://wazemuguv.weebly.com/uploads/1/3/4/4/134489137/1092799.pdf
    • https://cdn-cms.f-static.net/uploads/4392868/normal_5f8fa76d4338e.pdf
    • https://cdn-cms.f-static.net/uploads/4421627/normal_5f989ea9b9f00.pdf
    • https://cdn-cms.f-static.net/uploads/4379603/normal_5fa7308b87979.pdf
    • https://cdn-cms.f-static.net/uploads/4403806/normal_5fa86d6ea117a.pdf
    • https://gogakasepasepun.weebly.com/uploads/1/3/4/3/134375341/debcc6f.pdf
    • https://cdn-cms.f-static.net/uploads/4366947/normal_5f87412f33066.pdf
    • https://zatazonikafude.weebly.com/uploads/1/3/4/3/134340422/7643609.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sesafefanulokam/nepemisinu.pdf
    • https://s3.amazonaws.com/tixeligufokup/wumevogujunovo.pdf
    • https://s3.amazonaws.com/tadovu/gotozogofexigaxa.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_off00006ee1.bin
c21bb297f92b5a52ea44fc16347415bcf32d0075ae804bfda8cea257fb2b2233		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE1 5396 bytes
font_01_sfnt_off00008132.bin
12518bdcbe443acaf60a53f783c9f9977714031dd95a433c5fb67c8ceb048088		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8132 10796 bytes

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