Malicious PDF — malware analysis report

Static analysis result for SHA-256 336d4fcf8bbfc769…

MALICIOUS

PDF

70.3 KB Created: 2021-02-04 04:43:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 9c385caa468b21badfebd9b5e8242898 SHA-1: 0a3ac6d80d11db4153bb7b6f7b23b034b0637067 SHA-256: 336d4fcf8bbfc7695942da63af0c7fc564a2913a5736a105d6303c72ab7a36df
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/aws?utm_term=let+up+crossword+answer In PDF document text
    • https://biwojifagape.weebly.com/uploads/1/3/1/3/131381518/kosifuwif.pdfIn PDF document text
    • http://trixy-matrix.space/numenera_ninth_world_guidebookziua8.pdfIn PDF document text
    • http://citrus-fruit.space/jasik9ioww.pdfIn PDF document text
    • http://wrinklestiltskin.com/anais_nin_little_birds_read_online14zjd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427103/normal_5ff6bda646881.pdfIn PDF document text
    • http://spainwow.pro/biostatistical_analysis_5th_editionucgjm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402718/normal_5fec9bdc45ddf.pdfIn PDF document text
    • http://rating-bookmaker.ru/dimegazijarozinefaguihqie.pdfIn PDF document text
    • http://akmurzina.com/xojurubibasurak8qo9i.pdfIn PDF document text
    • http://lojisaka.22web.org/drawing_lewis_structures_practice_worksheet.pdfIn PDF document text
    • http://trenolgia.buzz/91597218765nsino.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zudosikewemer.epizy.com/bixodanigulaxokewub.pdfIn PDF document text
    • http://pasazaxara.rf.gd/h_s_c_marksheet_2019.pdfIn PDF document text
    • http://zumozitaporoka.epizy.com/62827258596.pdfIn PDF document text
    • http://wimarewixogax.epizy.com/ribozadir.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_off0000d7e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E2 5068 bytes
SHA-256: f70f6489cf7be8ba843e1ef31fbdbf80b87cab8963a8dde02709f941f5302f23
font_01_sfnt_off0000e940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE940 10392 bytes
SHA-256: 63c81697cf165f761eb2a0f3c494cb91fd82fbec63b11811fe4434befea79a88