Malicious PDF — malware analysis report

Static analysis result for SHA-256 adea29e3ba19ee30…

MALICIOUS

PDF

79.9 KB Created: 2021-03-23 08:30:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4f164e31762bf376059a798c7a7f226c SHA-1: d75d03c5e34c97d770171419643dbbba5c3a3c58 SHA-256: adea29e3ba19ee309837aae9ad7dd8eb8f1320db494bc0a453d92c164f1fef14
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/123?utm_term=anemia+falciforme+en+pediatria+pdf PDF link annotation
    • http://felagem.getenjoyment.net/20758171637.pdfIn PDF document text
    • http://duxasavorin.22web.org/moxadasepefubonoler.pdfIn PDF document text
    • http://pet-guru.shop/11597731729d0inn.pdfIn PDF document text
    • http://trells.space/nonivivuwapejewukatijay2nod.pdfIn PDF document text
    • https://wesuzimowigimeb.weebly.com/uploads/1/3/4/7/134745326/fogafemevij_zavofovox_biberuvujo_rorudefuxiri.pdfIn PDF document text
    • http://sojuvofud.22web.org/66036538109.pdfIn PDF document text
    • http://cheatyou.site/jadonawozilunexabitofoj8b7w4.pdfIn PDF document text
    • http://wumagakex.iblogger.org/18411512812.pdfIn PDF document text
    • http://edevletorg.com/ngp._emu_1._5._42_apkhe2vv.pdfIn PDF document text
    • https://fibarivinudew.weebly.com/uploads/1/3/5/3/135387866/dadulapomibi_nipatux.pdfIn PDF document text
    • http://zapixexarepol.medianewsonline.com/nawobulugafaxenizagume.pdfIn PDF document text
    • http://hq-cleartv.info/74950173183bjvpb.pdfIn PDF document text
    • http://lalexejiwisejul.iblogger.org/35424413469.pdfIn PDF document text
    • https://tixonanixob.weebly.com/uploads/1/3/4/8/134890866/zanitazu.pdfIn PDF document text
    • http://5coupons.info/61083268278st3do.pdfIn PDF document text
    • https://fadefufogu.weebly.com/uploads/1/3/5/9/135960472/4002712.pdfIn PDF document text
    • https://vosovijuz.weebly.com/uploads/1/3/0/8/130813614/nafuxuxezare.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zexizel.epizy.com/17873330700.pdfIn PDF document text
    • http://wejajesenopezoj.onlinewebshop.net/civil_engineering_drawing_handbook.pdfIn PDF document text
    • http://kazaxese.epizy.com/informacion_sobre_el_cauquen_colorado.pdfIn PDF document text
    • http://wawutanow.epizy.com/voicelive_play_manual.pdfIn PDF document text
    • http://logiweliziweje.onlinewebshop.net/manual_para_caja_registradora_royal_500dx.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
    • https://doi.org/10.29375/01237047.2378In 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_off0000f6ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EA 5112 bytes
SHA-256: ba9749d7de3c3b0e1612a5d31ff2099ddce2d674c287e704b461956c44ee4934
font_01_sfnt_off0001083c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1083C 12352 bytes
SHA-256: 2bed1f29aa10ff55583578f9d09b3a303da5760ee40070f924c4df96fbe2b0fe

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