Malicious PDF — malware analysis report

Static analysis result for SHA-256 375f6a6db07832f0…

MALICIOUS

PDF

41.8 KB Created: 2020-10-01 04:26:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5c4cd901985aeaad5b7d3c5f89048d14 SHA-1: e330dab6fcaafe44aba6b6f6519667e4554e6468 SHA-256: 375f6a6db07832f0c51f15cc8775a4a9e4e886b37dbb893fad57755c1409c2eb
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://ggtraff.ru/strik?keyword=keto+diet+book+pdf+free In PDF document text
    • http://boror.zisscustomglass.com/uploads/1/3/1/4/131452976/tunowot_nopasazitu_lipubuwuri.pdfIn PDF document text
    • http://madarip.westcoastjen.com/uploads/1/3/1/0/131070001/ladasegosew-litijune-jaduluguz.pdfIn PDF document text
    • http://vowifut.riverparishtheatre.org/uploads/1/3/1/4/131438641/7411082.pdfIn PDF document text
    • http://gerolota.flixhairandmakeup.co.uk/uploads/1/3/0/7/130775118/0a1bc1d7430dc.pdfIn PDF document text
    • http://files.shellydeangio.com/uploads/1/3/1/3/131398295/f98b97182db1c.pdfIn PDF document text
    • https://site-1037265.mozfiles.com/files/1037265/korefagabaxi.pdfIn PDF document text
    • https://site-1036678.mozfiles.com/files/1036678/buxidebarabo.pdfIn PDF document text
    • https://site-1037121.mozfiles.com/files/1037121/mivebovi.pdfIn PDF document text
    • https://site-1037085.mozfiles.com/files/1037085/wirudaxerimimumotokuzo.pdfIn PDF document text
    • https://site-1037176.mozfiles.com/files/1037176/11454577754.pdfIn PDF document text
    • https://site-1037860.mozfiles.com/files/1037860/besuxojuzoroginabujukiz.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/9e65c115-8b3e-4b4c-ae91-5494b56cf7cb/lugasulebijumokakuxaki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82c40678-e31b-44a0-993c-3bc835dd9754/95480860075.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d5bfbd5-0477-497c-bd98-161c5769b808/bewuboxifefunuxabomin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2355bfe5-52ff-4321-8310-fc2a2af3b3e5/xijuvorotalavozube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd7a4445-f706-4938-89f1-5c85d5fd202d/zigigezixarafinu.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_off000066d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66D0 4788 bytes
SHA-256: a00da89082b1e0139d6ba6a4451b7f21a2d888f3a95d8e57cfd0d24bfa539cab
font_01_sfnt_off00007726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7726 10452 bytes
SHA-256: 642cdeeea5409b33f5285d664ba9ea4c68b5d10c9b091bf2970ec7b3d94de865

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