Malicious PDF — malware analysis report

Static analysis result for SHA-256 4443f87f4fdaeae6…

MALICIOUS

PDF

58.2 KB Created: 2020-10-16 08:43:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 890f9e322c98315adb3e9baaa1c74da0 SHA-1: caf6ac93a063667b89cdf566aa6cc472338cf8ac SHA-256: 4443f87f4fdaeae64b963ee5a40fe41d7ba131f2740e1fe378e2f542bcac78c0
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/123?keyword=total+phone+cleaner+mod+apk In PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/1441493.pdfIn PDF document text
    • https://zisokilusativ.weebly.com/uploads/1/3/2/3/132303079/xovizolukudox.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/nogewamuvuzoli-kadujuzusuzo-jagebepazo-faposu.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/8279037.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/bewoti.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/mukobuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366645/normal_5f892def1c93f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368756/normal_5f8908ed4c975.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5f87150ede0af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f888376444f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f8920f30a635.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/lepimebosuxomu_fukixusa_famosulizik_sukoruzikazil.pdfIn PDF document text
    • https://fulipevaxavu.weebly.com/uploads/1/3/2/6/132695351/9124cb55f377.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/7386287.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/novovuxosijuzuz_wofabunutigepuw_dugulelura.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/1f53cf2b-f79f-4c7c-b02f-a009a9d892aa/nofopepurujod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaca8751-5030-4ffe-bd67-dcddaebc7431/bitefux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15ca737a-f50a-479c-90a4-bd8510dbfb38/35308760327.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49ee7731-36f2-4a02-9d85-2e3d198117ad/30718784169.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10a535e2-b84f-4e88-8840-0ac31e8a3bb6/59470217171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c17abc2f-1f4a-4769-a264-56fc68e5986f/puriwofexof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fa70f19-44ff-4fa4-af8b-eb788a5fc3f1/94869766499.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37299abe-9bb1-4dfb-b2f5-59166b5ce05a/puwerobirumup.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_off00008f68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F68 5148 bytes
SHA-256: 7afb52579a10d730cf9d4dbe1b93c896d30159463d8d5cd35fa530b28ff12015
font_01_sfnt_off0000a0b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0B7 10760 bytes
SHA-256: a24758fb5f7fe6a47b3684e2c180413d0bc582cffe43c00a749245c521b491ef
font_02_sfnt_off0000c58e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC58E 16156 bytes
SHA-256: 51c0df4927b6c625bff8d4722c3e725325acd3c375c895a134a01e6919b1bf36