Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a9eec4b4b3dcfcf…

MALICIOUS

PDF

73.2 KB Created: 2021-01-30 03:41:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5ecc23ee0d365cdd3d858b898e5b8510 SHA-1: 43227889e5a1e03dcff88d6b195edd18ead1faf1 SHA-256: 7a9eec4b4b3dcfcf55d1c658e911f7a61382dc4117b137721529a12e61a10aa2
224 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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=afk%20arena%20redemption%20codes%20current In PDF document text
    • http://pumujavebedopa.iblogger.org/94258979191.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505771/normal_5ffc81cf31fb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476288/normal_5fe9f4b18dcb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388815/normal_5fd790f1caa37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451750/normal_5fc9936234d03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423453/normal_6011368b974db.pdfIn PDF document text
    • http://instofficial.online/zapupimdsz1i.pdfIn PDF document text
    • http://thiswaytovogue.com/mishary_al_afasy_song_mp32lknp.pdfIn PDF document text
    • http://casbah2point0.com/1010_block_puzzle_game2bpwo.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/setikizo/gevode.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/functional_analysis_cbt_worksheet.pdfIn PDF document text
    • http://solazagu.epizy.com/malaysia_coin_collection_value_guide.pdfIn PDF document text
    • http://fetapewifug.epizy.com/biskut_beras_baby_guide.pdfIn PDF document text
    • http://rusakarazixano.epizy.com/gadokejomiketorux.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/sawawafeleloxisaxofuwar.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_off0000e291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE291 5320 bytes
SHA-256: f81a8d2f7ef0b12c961102b34c32b93e21163818f771a747bd4108433a1c6ac3
font_01_sfnt_off0000f49b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49B 10380 bytes
SHA-256: fcc78a5b23c2c7e5fa8860809dc18c72eb0711d14f438287947a174eb65c43be