Malicious PDF — malware analysis report

Static analysis result for SHA-256 8564b68d00d1cf6a…

MALICIOUS

PDF

46.8 KB Created: 2020-10-09 04:55:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3401a79160ac5c017328d944034d1f26 SHA-1: 2c469142c92aaf368e16a4372c058082d91bdbbd SHA-256: 8564b68d00d1cf6ac2905bb9da71414ac6c74fadc94e669e4bce368eddb6ea66
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a game guide. The presence of numerous external PDF links further suggests a link farm or redirection scheme designed to lead users to malicious 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://ggtraff.ru/strik?keyword=ulala+idle+adventure+temper+guide In PDF document text
    • http://putemuze.carolynwilsonartist.com/uploads/1/3/0/7/130775354/bc3612.pdfIn PDF document text
    • http://files.mtlclownfest.com/uploads/1/3/2/6/132695438/gerifapop_nalimetuxopi.pdfIn PDF document text
    • http://files.mywonderowl.com/uploads/1/3/1/3/131382346/887d050c4.pdfIn PDF document text
    • http://files.corrylandcrystalevents.com/uploads/1/3/2/3/132302857/dorizerapopoj.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/0b3f6a75-22ce-46d8-b12a-2673f6338ba3/69797687061.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a2720ef-9275-4699-9a72-20f7de3b0d0e/zunijesujuzoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27664612-dc16-402d-a67a-58b87ef02583/xumabigo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12f999ed-89a2-4438-96b2-498584fc5b0e/lifagigobikulapokebege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0babe45-8284-465a-9b22-5a8980a5d4d5/levegidopikutefugojum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8f37d0c-c447-4932-9001-b30add020e7d/82011138378.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7732039c-7be8-4850-8715-ad9e9fa27d72/potijetumafifutijekisuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ea25720-1a50-4486-9465-7714c1567c58/85866578435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8acabf1-77ba-478c-9949-bde5878f8022/rutinenufozalovivowirinej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f98b1d0-eeb1-4b0a-93be-f90505ad48e8/jatupegesopimage.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000634d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634D 5152 bytes
SHA-256: 6d0deee1821121abee87d99e6cb01a4811b5676a406f77f68aaf820e35ca3847
font_01_sfnt_off000074ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74CA 9908 bytes
SHA-256: 28574ab6acbfbc383e989a487f761e65c4d975b3997db645a4681d74a738d529
font_02_sfnt_off000096e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96E4 16196 bytes
SHA-256: 536551dee6876366cf8a5d925709f0aaa9c9f58e9963f4e154d0e8cf77de6ee3

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