Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b68b220ae6f68d7…

MALICIOUS

PDF

42.7 KB Created: 2020-11-08 21:45:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 371e0d25ef70629a4592fa0e3da5a204 SHA-1: 5d7c4d62d218996a04f4582e168d12f5f8471e43 SHA-256: 9b68b220ae6f68d718332772fec7b40d8e7c517c0cf78a0941e99503ed922e3d
154 Risk Score

Malware Insights

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

This PDF file contains numerous links, including one pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to drive traffic to potentially malicious sites. The presence of multiple external links and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful content.

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://traffking.ru/123?keyword=blood+of+the+dead+easter+egg+solo+offline In PDF document text
    • https://wozofawado.weebly.com/uploads/1/3/0/8/130874325/2994412.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449766/normal_5fa06cde34f9b.pdfIn PDF document text
    • https://vuzejugusu.weebly.com/uploads/1/3/4/4/134486163/6094606.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/norivutopezufet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378390/normal_5f9eae43b4094.pdfIn PDF document text
    • https://xitawameduzip.weebly.com/uploads/1/3/4/5/134511141/gisuwoniradudep_gafasu.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/b60e9153-cfa4-4585-93bc-1f31b7cf252b/sing_full_movie_online_free_putlocke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/230335d0-c5f9-456a-a4f8-7a7ea8482bdc/pololaregedefajetajekuru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aa28ba6-0cdb-4529-ba53-be27d68fbd74/68978577621.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ddc2ea8-0711-466d-996b-9e5457af299f/gpemu_pokemon_rom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdaa4c56-9546-4c87-bfa4-d10a0975fe24/xezitibuvimu.pdfIn PDF document text
    • https://bejepetuf.files.wordpress.com/2020/11/horror_skull_hd_wallpapers_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46a1a761-e295-45b1-92f7-219c76c8682c/xokomajilubonobufuwipo.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_off0000697b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x697B 5220 bytes
SHA-256: 6f10e31763d651681b4addd30e6da332063fe4c8d36f31d4e203da94ee724d30
font_01_sfnt_off00007b39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B39 9732 bytes
SHA-256: b711016eb8923f9969aaef8b20f52e939ae53dbb71efdfaa4f924e0d01b7ba49

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