Malicious PDF — malware analysis report

Static analysis result for SHA-256 32877d201aa11d13…

MALICIOUS

PDF

48.9 KB Created: 2020-11-04 01:17:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 295611392bc4edab1106adb230b673c8 SHA-1: ebdfd027ff26602234f6c4a80810208ebfe5b9a8 SHA-256: 32877d201aa11d130c5a1597640742bddf098eead4aca7e202e30decdcd61725
94 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://cctraff.ru/123?keyword=parents+consent+form'. The document body, though heavily obfuscated, contains text that suggests a lure related to a 'parents consent form'. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL indicates an attempt to redirect the user to a harmful 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://cctraff.ru/123?keyword=parents+consent+form In PDF document text
    • https://petugureb.weebly.com/uploads/1/3/4/4/134445868/f9be70b537e6.pdfIn PDF document text
    • https://kazajiti.weebly.com/uploads/1/3/4/4/134456981/benoxexose-makibowetula.pdfIn PDF document text
    • https://wuserugojikenek.weebly.com/uploads/1/3/4/5/134513610/3767402.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/likanutavorolebonat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461232/normal_5fa1e0a87d97a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/97f80763-e4dc-40a9-aa55-d4856b4ca83e/94544604041.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/jedasisorufuzumoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3a5675a-3bae-4b30-966e-38d554b02996/ropetunopupixanofajurot.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/vaxasalenimivozena.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/rexanoxofi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98c8df88-1746-433a-a56c-cf7bea690514/59871450886.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/vaimanika_shastra_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/xhosa_anglican_hymn_book_download.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8031 4996 bytes
SHA-256: c9f72bf7cde702185782b00f5587a2394b3a6acccc67b7831e5ebb1b54d84414
font_01_sfnt_off0000911e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x911E 11280 bytes
SHA-256: beaa7f24c8a108f294287cc2ac7977fb331a2b2d91f80b51eb1fa02a24a1b0c4