Malicious PDF — malware analysis report

Static analysis result for SHA-256 6439fce2c2abb376…

MALICIOUS

PDF

47.5 KB Created: 2020-10-12 00:26:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: d24188fadc9e6f5a251d5f206e55b339 SHA-1: e68d7a7ab74315a0fc514e1f540592a9d58e06ba SHA-256: 6439fce2c2abb376d1eb59469be8b3a92b57a4f8829a5f923a4b8123db8c9a83
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=a+mixture+of+82.49+g+of+aluminum In PDF document text
    • http://files.teachingvisuallyimpaired.com/uploads/1/3/1/4/131438847/wasakowika_majafajorosojas.pdfIn PDF document text
    • http://files.beldingbands.org/uploads/1/3/0/7/130776855/tekojonapoz-zokoxumu.pdfIn PDF document text
    • http://files.gkcphotography.com/uploads/1/3/1/4/131438741/8698267.pdfIn PDF document text
    • https://site-1041937.mozfiles.com/files/1041937/xiferapa.pdfIn PDF document text
    • https://site-1038532.mozfiles.com/files/1038532/75755584685.pdfIn PDF document text
    • https://site-1037069.mozfiles.com/files/1037069/jafixafupugeradidami.pdfIn PDF document text
    • https://site-1040373.mozfiles.com/files/1040373/kaxowisakos.pdfIn PDF document text
    • https://site-1039508.mozfiles.com/files/1039508/jexumajokif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/1b1b937a-5f96-41cb-a473-13ba1a8395a3/81889724002.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d8889da-5846-47c3-993b-40c77f23e5a2/89888643975.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3f15b7f-85ea-4962-b414-a674c45bb7ff/51546792074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78578519-0d88-443f-947b-f1bb793367b3/13538423480.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70219f6d-7cfd-402a-8322-06591c661b2f/63309924702.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa31cf3f-ab46-43ff-bc11-bdcbb3047e3a/fusixakalutefobapobemume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f481a67e-34b0-4a00-a0d9-e5838ee4bf48/gisijimabolam.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED9 5448 bytes
SHA-256: 8d30a7d401ee004a1c4e76bd97174db19cabbbe6b3376ea1287769951ca4d5b4
font_01_sfnt_off00007160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7160 16096 bytes
SHA-256: ed883e0a6adb993babaf17cb8a8d5d07e33b53181152964aa5db02d11daf596c
font_02_sfnt_off0000a302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA302 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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