Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bf75a32b583f0a3…

MALICIOUS

PDF

75.7 KB Created: 2021-01-25 11:47:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 151b3732fb3ddab48b91ed86322f6275 SHA-1: 32c2d99197f15e6853919c7b70abc0b63fb53a21 SHA-256: 9bf75a32b583f0a360ed68d806dabc6184b5ac644bda9a72297cc15f3f3b6443
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://crophysi.ru/wb?keyword=battlestar%20galactica%20starship%20battles%20game In PDF document text
    • http://vatamulejuvovi.22web.org/lowozesofevoga.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459631/normal_5feea569ca76e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377663/normal_5ff928233a7d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402960/normal_5fe692417c327.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447267/normal_5fcb000c8b333.pdfIn PDF document text
    • https://cdn.sqhk.co/duzixulok/vqMjgji/exploration_craft_mod_apk_android_1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391599/normal_5fd60fe3b2c90.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365627/normal_5fcd80b117d95.pdfIn PDF document text
    • http://netewe8.xyz/cute_drawings_easy_ideasa59ir.pdfIn PDF document text
    • https://cdn.sqhk.co/boxokozofe/jikgijb/download_game_sweet_candy_frenzy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jesudojisa.rf.gd/m._a_islamiat_date_sheet_2019_bzu.pdfIn PDF document text
    • http://bonubenevutura.epizy.com/letter_format_template_word_free.pdfIn PDF document text
    • http://relimimukavewuj.rf.gd/34452651459.pdfIn PDF document text
    • http://balazetesu.epizy.com/67554479552.pdfIn PDF document text
    • http://sadisuden.epizy.com/12239183112.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_off0000eb62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB62 5536 bytes
SHA-256: e8816467b497e357316b61935c55d18b732230ebcfd4c734d41b3e8eb1f607a6
font_01_sfnt_off0000fe0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0B 10512 bytes
SHA-256: 9a4f061e4a11955edc440e6cf4bf1fb5781600d721e3ef7684b5251cbca6f7ac