Malicious PDF — malware analysis report

Static analysis result for SHA-256 c78966d4e9b0dbb7…

MALICIOUS

PDF

42.6 KB Created: 2020-11-03 08:14:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: cfb31d9266c4d517addaf2a7a3f8311e SHA-1: 789aad17af5f9753688fd63f9889655d252bab3f SHA-256: c78966d4e9b0dbb7f15e362ef458cd8abed298620fcb41fe69f1240009025c01
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, disguised as a user manual. The ML classifier also strongly flagged this PDF as malicious. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

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://ggtraff.ru/aws?keyword=nortel+norstar+m7310+user+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403129/normal_5f9da940e49b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425009/normal_5f9a490ce007e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5f9878de46a0d.pdfIn PDF document text
    • https://wuvirinofibugiz.weebly.com/uploads/1/3/1/0/131070402/fijuxiwu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/cadsofttools_to_dw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6989/8909/files/cinema_box_apk_download_link.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a81a984-c66b-4415-bc2a-42944cbd53f2/gufoduzavo.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/33_the_series.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/76687431361.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D8C 2996 bytes
SHA-256: 92af3e8a7ff1acb429e3411c13eab3feef9d119e57e2bea3577cdcc05cb3f310
font_01_sfnt_off0000684a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x684A 5236 bytes
SHA-256: fbad566b7635dc61812e98427c198f717055c547017b1344d75d5a910516b2e4
font_02_sfnt_off00007a0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0B 10472 bytes
SHA-256: 35880fd13723519016521d1fd7383236ea08f1de84c944bec06419239ed3f0a5

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