Malicious PDF — malware analysis report

Static analysis result for SHA-256 f107a008afed8e2d…

MALICIOUS

PDF

87.6 KB Created: 2021-03-16 08:07:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8651eed573698c30dc9af33608f5d712 SHA-1: 5c3d197e15da482af6078ca756459039940409cd SHA-256: f107a008afed8e2d736e176668b104e16e763f31861ed5b06801661f03cb4b24
134 Risk Score

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=soda+pdf+price PDF link annotation
    • http://womotov.22web.org/complete_boondocks_season_2.pdfIn PDF document text
    • http://magic-world.site/nederlands_vergiftigingen_informatie_centrum_nvic6tnb9.pdfIn PDF document text
    • http://firstsecu-paypal.com/sherlock_holmes_the_sign_of_four_chapter_5_summary49s91.pdfIn PDF document text
    • http://delayikapy.xyz/metformina_y_acidosis_lacticae1nqb.pdfIn PDF document text
    • http://foxeletumirud.iblogger.org/6680939412.pdfIn PDF document text
    • http://testersairf.xyz/vosaveigeqx.pdfIn PDF document text
    • http://ranupila.mywebcommunity.org/12917477289.pdfIn PDF document text
    • http://leraxedosu.22web.org/blood_ph_alkaline_food_list.pdfIn PDF document text
    • http://suvoramitasowiv.22web.org/toxoplasmosis_veterinaria.pdfIn PDF document text
    • https://mitesevutij.weebly.com/uploads/1/3/4/7/134717039/b0703.pdfIn PDF document text
    • http://vokotavawer.iblogger.org/85956795217.pdfIn PDF document text
    • http://purubifo.medianewsonline.com/home_blood_pressure_monitoring_chart.pdfIn PDF document text
    • https://xaduregenotilok.weebly.com/uploads/1/3/4/7/134711203/912780.pdfIn PDF document text
    • http://kutejovanog.getenjoyment.net/tewixosetujabakexutesapeb.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/30936308354.pdfIn PDF document text
    • http://1xbet-football.fun/6411474872swdh8.pdfIn PDF document text
    • http://xosikuxevezi.22web.org/assister_a_la_formation_en_anglais.pdfIn PDF document text
    • https://fagisidide.weebly.com/uploads/1/3/2/6/132682833/givunakexo.pdfIn PDF document text
    • https://tifidanubaliso.weebly.com/uploads/1/3/2/7/132740836/wefuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/76305435040.pdfIn PDF document text
    • http://topenogu.epizy.com/60540997038.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/answer_machine_messages_for_businesses_examples.pdfIn PDF document text
    • http://pomefeneliwawe.epizy.com/how_to_reset_daikin_ducted_air_conditioner.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_off00010eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECA 5044 bytes
SHA-256: 5f84aa93f25dcc4b4ccad838c7a5f96f762ad6db93e8abf6fbff56ae91ed760f
font_01_sfnt_off00012005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12005 21784 bytes
SHA-256: 25000bab007fd59c87d9e63bc75c1caeb792df669e67caebf7f0f0d013c50df9