Malicious PDF — malware analysis report

Static analysis result for SHA-256 17b41a7595c73f0e…

MALICIOUS

PDF

85.4 KB Created: 2021-03-29 22:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 89628d61b024700a9d18a50f961f3138 SHA-1: 2aa55a0c976c71ad56f784e36b651f05ea8d42d8 SHA-256: 17b41a7595c73f0e1215616716ddd3aa20517606e136f4147a37fb984366c82b
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-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://maypoin.ru/strik?utm_term=texas+defensive+driving+course+test+answers PDF link annotation
    • https://cdn.sqhk.co/kuwusemob/qCyRcJP/fdic_call_report_glossary.pdfIn PDF document text
    • http://anrostore.ru/the_house_of_the_spirits_essay_topics2fmmp.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/bqdn3if/12360723353.pdfIn PDF document text
    • http://dabosesavedevet.medianewsonline.com/aristelle_pille_packungsbeilage.pdfIn PDF document text
    • https://cdn.sqhk.co/vavetiset/AifDuge/templates_powerpoint_slides.pdfIn PDF document text
    • https://cdn.sqhk.co/fixuzigetir/Ljhiejf/godus_game_mod_apk.pdfIn PDF document text
    • http://voicebftyi.com/wekopulifivutejezom7t2ps.pdfIn PDF document text
    • http://vudujupuboneg.22web.org/latewoxutu.pdfIn PDF document text
    • http://terakusinuw.mypressonline.com/18444647152.pdfIn PDF document text
    • http://fodagikegabafak.iblogger.org/service_marketing_concepts_strategies_and_cases.pdfIn PDF document text
    • http://abanca-electronica.com/how_to_use_the_advent_candlesakbnu.pdfIn PDF document text
    • http://nipizakevenuvis.scienceontheweb.net/27888863003.pdfIn PDF document text
    • http://daludaja.getenjoyment.net/tekogowatutijize.pdfIn PDF document text
    • http://fragcups.com/catia_v5-_6r2015_crackjtyjs.pdfIn PDF document text
    • https://cdn.sqhk.co/mirusopujame/ENieFvh/1859001408.pdfIn PDF document text
    • http://organize.shop/wogoztxiit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/88ed6586-5ea4-4bbf-8d87-b5a465fc67ac/management_information_systems_associate_degree_jobs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6395b908-f851-4cec-bf5d-f99687736da2/rca_visys_phone.pdfIn PDF document text
    • http://zubeleboju.epizy.com/530744756.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46ef93e8-e9ee-4a55-bfb1-8d10c0d1bead/what_form_of_government_does_the_soviet_union_have.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08852f28-bcf8-4d3c-929d-716d9cbce28e/beethoven_piano_sonata_no_14.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9252a9d-d83e-4ba1-962b-1f25e5c7bca1/how_to_play_munchkin_for_dummies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1da9a6ba-a5f4-42a4-b5ce-27c164469f73/hagen_hg_fluval_fx5_fx6_motor_unit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f7e1776-13eb-4e5c-8e7c-77f0cf243e30/wordpress_missing_zlib_extensions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/796e9f92-a197-40e2-9429-c225975fb18b/magnetic_eddy-current_sensor.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA0 5328 bytes
SHA-256: 48a14e9c1d396db9bc25020edc4e9b42c52679f0c9256b1743978565296c5051
font_01_sfnt_off00010ceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEB 10920 bytes
SHA-256: 45cd4c9e60078166659eafde42052dc7e2bafd7a05e14c8c12235945111af21f
font_02_sfnt_off00013264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13264 16232 bytes
SHA-256: 1d4ebd634e9a4b1afc3ba2e660f7abdbad7ecfb3c20c2fb0daf688bec4f9a1d5