Malicious PDF — malware analysis report

Static analysis result for SHA-256 23c24225cba4ca99…

MALICIOUS

PDF

75.5 KB Created: 2021-02-19 15:38:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: bd148819c91f99565c63c0b4a7df6efa SHA-1: 5ceae3f40e822723b791af6c8086e7dabd7fb102 SHA-256: 23c24225cba4ca99639271b7a9b5e040b4ba67a2b261a952679b4aada8f2591a
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://baarspo.ru/wix?keyword=what+skills+do+scientists+use PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4390071/normal_5fdeeb04b0476.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476282/normal_601cf9b290a1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412380/normal_600f9766783cf.pdfIn PDF document text
    • https://gakewejodum.weebly.com/uploads/1/3/4/9/134902465/zuposewurolivovoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445114/normal_5fd2ddc39ce9a.pdfIn PDF document text
    • https://nubugudapo.weebly.com/uploads/1/3/2/8/132814946/5957234.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_602b71a17f91a.pdfIn PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/2647255.pdfIn PDF document text
    • https://levarimabogi.weebly.com/uploads/1/3/5/3/135328943/pimox-gofezefu-sigefividukufem.pdfIn PDF document text
    • https://vuxabodunufa.weebly.com/uploads/1/3/1/4/131407539/nuzojutova_xolanodufarulad_gutef_sifizug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/jexata.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/peaky_blinders_season_2_episode_4.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/after_ever_happy_google_drive.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/bitcoin_faucet_free_btc_apk.pdfIn PDF document text
    • http://danokob.epizy.com/ye_barish_ka_pani_lyrics.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_off0000ec9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9D 5008 bytes
SHA-256: 1f68da0c045e2a25b746b19e1123fe096294fc484abdd6a6b32eae9264c10df3
font_01_sfnt_off0000fdb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB0 10476 bytes
SHA-256: 7e87a8a80f7c6627ef5f7c1c294bb519671dda83a7c531809384480096cc6c44