Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0ffdf27a1820745…

MALICIOUS

PDF

76.5 KB Created: 2021-04-01 21:08:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e0e03997e7560ac0545155036bca0b7f SHA-1: c79e371b68a1da4e741b528f96e57abcc72ef1cc SHA-256: e0ffdf27a1820745f2d298ef035d93e4451aca746cf8a0eb4dd48e52e0d82b55
126 Risk Score

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Numerous external URIs were embedded within the PDF, with one heuristic identifying it as a link farm on disposable hosting. The presence of many links suggests an attempt to redirect users to potentially malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/wix?keyword=1d+dream+boy+game PDF link annotation
    • http://redirunna.xyz/the_great_depression_lasted_nearly_years_quizlet7xo4a.pdfIn PDF document text
    • http://romeita.fun/martin_luther_commentary_on_romansi2ywn.pdfIn PDF document text
    • https://cdn.sqhk.co/lirotigi/fjaH7gd/transunion_free_credit_report_call.pdfIn PDF document text
    • https://cdn.sqhk.co/bumadawab/SuwRdtp/american_football_games_february_2020.pdfIn PDF document text
    • https://visimekariluvog.weebly.com/uploads/1/3/1/4/131483525/7332589.pdfIn PDF document text
    • http://forovasax.medianewsonline.com/apology_plato_download.pdfIn PDF document text
    • http://glasshookahcatering.com/powerbeats_3_manual_espaolb94nv.pdfIn PDF document text
    • http://salleapp.xyz/how_to_find_joint_in_matlab9df9l.pdfIn PDF document text
    • http://baramijotafexo.mypressonline.com/polaroid_sx_70_case.pdfIn PDF document text
    • http://remigajapalogu.22web.org/takavugov.pdfIn PDF document text
    • https://cdn.sqhk.co/kizusuvut/sxifidK/87181224179.pdfIn PDF document text
    • https://cdn.sqhk.co/zijigemeworu/hWNR0if/66139297981.pdfIn PDF document text
    • http://pasikufopubiwo.mypressonline.com/74860972280.pdfIn PDF document text
    • https://mepodatadun.weebly.com/uploads/1/3/1/4/131452799/zetasinojulup_pexujadiwa_wenuvej_wekixikanulitev.pdfIn PDF document text
    • http://lunamawel.22web.org/74607087572.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nakepusejedub.epizy.com/fuzimawidabusovoxip.pdfIn PDF document text
    • http://diwiludoki.rf.gd/sophisticated_lady_ellington.pdfIn PDF document text
    • http://matewedidoxeber.onlinewebshop.net/gilasuwuvajilolekabun.pdfIn PDF document text
    • http://dasopikabuma.rf.gd/pupukoxewujatafid.pdfIn PDF document text
    • http://pimifemegizak.epizy.com/48776894745.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_off0000ef4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4B 5132 bytes
SHA-256: fecb6f8227ae0542d2b5be724ec7c84217e2bcf7ef22c676a720c0ca26f9c0be
font_01_sfnt_off000100b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B3 10988 bytes
SHA-256: 141faa949e3f9f5b52f2c8cf63091cae132abbd59ef4b17eba3817603a371437

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