Malicious PDF — malware analysis report

Static analysis result for SHA-256 47c84ce624cf3383…

MALICIOUS

PDF

50.0 KB Created: 2020-11-04 20:22:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 303e0357b9b0f74b1c6ff855433dd7ca SHA-1: 478e98d644026f382cc103a8bebd9ce8374c5f01 SHA-256: 47c84ce624cf33837e9ce2cf0ef6412825fcf5530b3d66a3a61e64c8df742eff
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the critical PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the primary malicious URL, suggesting an attempt to lure users to a compromised site.

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://ggtraff.ru/aws?keyword=4th+and+goal+2015+glowmonkey+game In PDF document text
    • https://pesajupamobe.weebly.com/uploads/1/3/1/6/131607203/1402391.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411682/normal_5f93801d48fcd.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/nitatotol/tedepotojuzapapokuji.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/mission_craze_versa_bow_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cb5dfd4-459d-4ce0-8e82-7eaddde504c2/64172059578.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76d66e40-5084-41a3-be16-143d9bf5e278/real_number_system_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0339d92-c752-4214-8bf9-7ff48facbb36/hytrol_roller_conveyor_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01cf7219-458c-45c2-8e3a-89fc46faf450/kenomumezivitari.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/achtung_panzer_pl.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_off00008356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8356 5664 bytes
SHA-256: e7f6bd4403543143e28a9e2528c7ca786403c1d0f63e923f6b1140086b0e5b15
font_01_sfnt_off000096a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96A5 10672 bytes
SHA-256: 6ba6d0c745b9697c357355458b93200b9f8f91d9d955f3b052900358af33c23c