Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f1e43226ea0a675…

MALICIOUS

PDF

76.0 KB Created: 2021-04-01 07:32:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 74fd9e326f024e42cf19274aa6468734 SHA-1: e1376543e55fa7fb5deade10855d6bfba876c547 SHA-256: 2f1e43226ea0a6755ba6cd21918ed9150d9a41f7842b03cb47be5b3c32319393
66 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • 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://resalured.ru/award?keyword=alcohol+screening+tools+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405197/normal_604002d8760fc.pdfIn PDF document text
    • https://zuzuvisaze.weebly.com/uploads/1/3/0/7/130738998/75014212f656f9e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410986/normal_5fe39a7af2b82.pdfIn PDF document text
    • https://voxepobar.weebly.com/uploads/1/3/4/6/134668427/fofotumub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383128/normal_600b4de6bbdd0.pdfIn PDF document text
    • http://zitokujamu.mypressonline.com/captain_underpants_full_movie_download_480p.pdfIn PDF document text
    • https://cdn.sqhk.co/vivepovugeli/uhcSBgh/battery_tender_plus_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463010/normal_5fe8742905aaf.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/yJbEYih/27777539689.pdfIn PDF document text
    • https://doxefifuz.weebly.com/uploads/1/3/0/9/130969363/860095.pdfIn PDF document text
    • https://cdn.sqhk.co/rumoligodo/jinibJJ/aggiungere_sticker_su_foto_whatsapp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389370/normal_5ffef9c05ecda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372073/normal_5fd2f5af15a9d.pdfIn PDF document text
    • https://jogijomovap.weebly.com/uploads/1/3/0/9/130969693/xelokumomonuj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448744/normal_6008043fa7e0e.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/jdjgjiN/metal_swing_sets_for_sale_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377662/normal_5fdd6c8cb510d.pdfIn PDF document text
    • http://manamuposa.getenjoyment.net/convert_arabic_to_english_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393785/normal_606394cbee64e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nibopinalilabaj.onlinewebshop.net/wunumujose.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/spotify_ios_8.pdfIn PDF document text
    • http://lojabupabavize.onlinewebshop.net/what_is_the_name_of_the_next_keeper_of_the_lost_cities_book.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/bogimavor.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/jajeba.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_off0000ec72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC72 5196 bytes
SHA-256: 94ba64cf330bef79dfd6d5cda1ebec123a9d25bb913313be8fc11b4ac1ef860e
font_01_sfnt_off0000fe1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1B 10756 bytes
SHA-256: 5320803a263357fea509e0558e5b75795c3b1309ae7bb17357e047245eda2fec