Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae2df422ef6127e…

MALICIOUS

PDF

81.1 KB Created: 2021-04-02 08:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 86b287055aced0d7faed809b2d0c4d18 SHA-1: 9031da21d6518c56a70b0adb87f2cd6a686a3260 SHA-256: cae2df422ef6127ed700c8d26382c52ecc5f39726e414dc269b87feda60f0e13
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and 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 0.9990

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://lozipotod.ru/award?keyword=vocabulary+activities+pdf+intermediate PDF link annotation
    • http://borutafag.66ghz.com/difference_between_intranet_and_extranet.pdfIn PDF document text
    • http://madawuboso.sportsontheweb.net/63449672794.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/fish_corner_devon_street_chicago.pdfIn PDF document text
    • https://cdn.sqhk.co/guranotup/Gjd8mIn/tippy_toe_tippy_tay.pdfIn PDF document text
    • http://dokaxirugik.medianewsonline.com/neumonia_complicada_pediatria_2020.pdfIn PDF document text
    • https://bimozasobo.weebly.com/uploads/1/3/1/3/131398313/7123753.pdfIn PDF document text
    • http://jokidinavefo.22web.org/phone_dialing_sound_effect.pdfIn PDF document text
    • http://kedugobepuged.mywebcommunity.org/morgan_anesthesia_5th_edition_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/buzivafulet/gjgKXgf/sofavukolodif.pdfIn PDF document text
    • http://pekibule.iblogger.org/birthday_invitation_card_design_psd.pdfIn PDF document text
    • http://gazupoz.sportsontheweb.net/12794933211.pdfIn PDF document text
    • http://pupezito.iblogger.org/pdf_converter_to_word_arabic_support_online.pdfIn PDF document text
    • https://cdn.sqhk.co/guwewaxa/bxjg3bc/rope_around_waist_high_priest.pdfIn PDF document text
    • https://cdn.sqhk.co/pumapajewa/ihKhjcr/bose_qc25_android_vs_iphone.pdfIn PDF document text
    • http://duxaromovaxizom.iblogger.org/asme_sec_viii_div_1_2020_free_download.pdfIn PDF document text
    • https://razesune.weebly.com/uploads/1/3/3/9/133986972/32b78a925ee27.pdfIn PDF document text
    • http://bizifawidipegib.iblogger.org/barras_de_access_gratis.pdfIn PDF document text
    • http://xajaweronasuxo.22web.org/68967042818.pdfIn PDF document text
    • https://farejebizaf.weebly.com/uploads/1/3/0/8/130815013/kalitesejuzuxiwola.pdfIn PDF document text
    • http://jovepodixowofow.mygamesonline.org/apache_poi_xwpfdocument_to.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jokipuzovorije.epizy.com/2616819627.pdfIn PDF document text
    • http://wojudor.epizy.com/bohemia_pagol_song_video.pdfIn PDF document text
    • http://mijovutotukedes.onlinewebshop.net/cubs_schedule.pdfIn PDF document text
    • http://xomosim.epizy.com/ooma_linx_wireless_phone_jack.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BB 5448 bytes
SHA-256: fe1a1d2c98cbe887793bdcad54d66b76006d82f8c0df13a683f433616b4b1d0f
font_01_sfnt_off0001041f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041F 10644 bytes
SHA-256: 7313a1d2a326f71a6c3bcc3c86d9eb6f62ff7c321270fcbbe8b9f5ffbddac482
font_02_sfnt_off0001285c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1285C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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