Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d910a65b0c2d921…

MALICIOUS

PDF

41.9 KB Created: 2020-10-09 01:55:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 795aadd986dd818e199ff4cb8f716d63 SHA-1: e5de2d7b7c6b31783284ca2d665141fba00a8e7f SHA-256: 7d910a65b0c2d921e9d480b6a506a31a2a9ee358049a8a3603c4b74f07d4f035
124 Risk Score

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?keyword=cinema+4d+r20+documentation In PDF document text
    • https://site-1037024.mozfiles.com/files/1037024/visonug.pdfIn PDF document text
    • https://site-1036821.mozfiles.com/files/1036821/32759005218.pdfIn PDF document text
    • https://site-1038931.mozfiles.com/files/1038931/luwavutukumudinutuxo.pdfIn PDF document text
    • https://site-1039896.mozfiles.com/files/1039896/71387855867.pdfIn PDF document text
    • https://site-1043081.mozfiles.com/files/1043081/muxufevotuwibapofot.pdfIn PDF document text
    • https://site-1037267.mozfiles.com/files/1037267/22205561171.pdfIn PDF document text
    • https://site-1037141.mozfiles.com/files/1037141/96445281602.pdfIn PDF document text
    • https://site-1037235.mozfiles.com/files/1037235/62826166204.pdfIn PDF document text
    • https://site-1043095.mozfiles.com/files/1043095/5779137615.pdfIn PDF document text
    • https://site-1036633.mozfiles.com/files/1036633/dixinorifixuligizelafud.pdfIn PDF document text
    • http://files.marisareneephoto.com/uploads/1/3/1/3/131380786/xodavuvikuje.pdfIn PDF document text
    • http://files.flinthillsneuropsych.com/uploads/1/3/2/6/132683142/5247928.pdfIn PDF document text
    • http://files.spanishduluth.com/uploads/1/3/0/8/130874030/wipewojubatenopuw.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/e6329685-2db9-496b-a731-ec9016d3ec11/wanidalezudigaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5db58db1-37fc-4a90-ae22-20e088cea65c/kosevetobelovit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83e79a22-662e-4553-8a33-d7996b098459/famimakosumomawasowuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a3c1e9c-6341-4ecd-8c81-206cfe0cf148/40776069955.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_off00005724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5724 3776 bytes
SHA-256: 7abee62b52f2f5c79443d0e7cb432644f7437fbc466beaf7cc6d102eff3a4b64
font_01_sfnt_off000064b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B3 5140 bytes
SHA-256: 949c9a9dce4851dac657d4a96c94bf4d14b1efb50552cb77f12f68bcbd12605d
font_02_sfnt_off00007614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7614 10468 bytes
SHA-256: 2837d44efa6046942a219a96aba603f64522120be2a9ee1712d87eabceddb6cb

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