Malicious PDF — malware analysis report

Static analysis result for SHA-256 e65fad7f4a281bcb…

MALICIOUS

PDF

66.7 KB Created: 2021-03-01 10:20:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 68ef018cfeafa42e156aaed7ba819397 SHA-1: d37c11ff1e3f8f68399afd406aaa133d15f94ac6 SHA-256: e65fad7f4a281bcba7af7f86812efa8e349f956d738ef9ea03baf6d516e06260
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document body, though heavily obfuscated, contains text related to 'Ti 84 calculator charger', suggesting a lure to redirect users to malicious websites. The presence of numerous external URIs, many hosted on disposable domains, further supports the phishing and link-farming nature of this document.

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
  • 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://botokaw.ru/strik?utm_term=ti+84+calculator+charger PDF link annotation
    • http://white-x.fun/23291729053ctdpv.pdfIn PDF document text
    • https://wozibasibif.weebly.com/uploads/1/3/4/8/134868806/1177125.pdfIn PDF document text
    • http://jujibej.iblogger.org/64120898840.pdfIn PDF document text
    • http://latuha.com/imagine_dragons_demonsmlm0k.pdfIn PDF document text
    • http://djami.ru/trombosis_mesenterica_sintomas_y_signosp78q8.pdfIn PDF document text
    • http://mifvideo.space/fedex_brooklyn_locationsmhbpo.pdfIn PDF document text
    • http://lovechat24.club/crossfit_wod_chest_workouts_at_home99nx9.pdfIn PDF document text
    • https://femovoba.weebly.com/uploads/1/3/0/7/130775826/2960097.pdfIn PDF document text
    • http://dietnatur.fun/tuziduw6h4kt.pdfIn PDF document text
    • http://dixuvexawob.22web.org/neraxafubixagiretepofepop.pdfIn PDF document text
    • https://wanomumopanud.weebly.com/uploads/1/3/1/3/131379193/5130614.pdfIn PDF document text
    • http://ingmijn.com/haier_portable_air_conditioner_user_manualc4kgu.pdfIn PDF document text
    • http://trokot-online.xyz/material_safety_data_sheet_2_4_dinitrophenylhydrazineprm5f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pufupivati.epizy.com/esma_guidelines_aifm_delegation.pdfIn PDF document text
    • http://jojomuge.epizy.com/3d_printer_history.pdfIn PDF document text
    • http://gigivixegaxun.epizy.com/63442648260.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/kixukorukunaganedudikukik.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/23736534227.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_off0000c7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FA 5116 bytes
SHA-256: 706c44571f6bd62652adba37e069bcea1b33f8813bd2e239a9afb425864ed1ab
font_01_sfnt_off0000d95f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95F 10768 bytes
SHA-256: 590853700fcf93d28fad923ddce96e114afb77de536fd062303822e88c1bed8f

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