Malicious PDF — malware analysis report

Static analysis result for SHA-256 d616367b0fd55b06…

MALICIOUS

PDF

75.8 KB Created: 2021-02-10 00:55:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 05355a378d7aaeeac8ce7f191474c270 SHA-1: 86a1973990899efd109fca614c7ba974072191df SHA-256: d616367b0fd55b06c3d39a93b9bdfcf284bc3b372b129eb377f7414cf9144aa1
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wb?keyword=android%20tablet%20%20pending In PDF document text
    • https://cdn.sqhk.co/jegamaxegev/heYvCge/garukepomijapikagafis.pdfIn PDF document text
    • https://cdn.sqhk.co/samofetob/3ia2uF7/r_b_soul_music.pdfIn PDF document text
    • http://help-feedback-amzn3.xyz/eragon_inheritance_book_47wczd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477637/normal_600ca808d7785.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450438/normal_5fed2f2e6da41.pdfIn PDF document text
    • https://cdn.sqhk.co/zivunegas/hcia1cC/zedge_app_for_iphone_7_plus.pdfIn PDF document text
    • http://matcobzor.ru/49509940730fxl3x.pdfIn PDF document text
    • http://marinarus.space/lawebolifuvojakipowalageaayf.pdfIn PDF document text
    • https://linezajokopu.weebly.com/uploads/1/3/4/6/134629872/3099681.pdfIn PDF document text
    • https://betisifi.weebly.com/uploads/1/3/1/4/131438474/pufufe.pdfIn PDF document text
    • http://gelivebun.22web.org/definition_of_accounting_information_system.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fupizud.rf.gd/dosupagasura.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/xabupetes.pdfIn PDF document text
    • http://busajolixaba.epizy.com/babbu_maan_song_dj.pdfIn PDF document text
    • http://fefomuk.epizy.com/tujiwadikotirivatuz.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_off0000ec21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC21 5076 bytes
SHA-256: 8c48ad0506e81911f09117e234445056acdcef80b11c6b16c74a7b55096424c4
font_01_sfnt_off0000fd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6E 10924 bytes
SHA-256: f742362e87fca8a6ffc79884a109263b8accb042ab26a954978cb34bddbb06c3