Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2cbc7948d6b8d42…

MALICIOUS

PDF

104.3 KB Created: 2021-03-25 01:17:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: aa80b7518b272a78da7bbc327d45d763 SHA-1: 6c14d679ea885233d0e0006bdbeae1afc32dfb93 SHA-256: c2cbc7948d6b8d4241734eafbb8c67f984eac87bd1b1a28975de89f9fafc9bc7
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 0.9987

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://jottigo.ru/award?keyword=advances+in+polymer+materials+and+technology+pdf PDF link annotation
    • http://waverufusufafuv.scienceontheweb.net/nezenujulaf.pdfIn PDF document text
    • http://zeriwegitesokom.iblogger.org/zovilebogoxiwewuparax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444852/normal_60281fedabba8.pdfIn PDF document text
    • http://xovijezup.mywebcommunity.org/tl-wr841n_config_page.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376382/normal_6041c4243a234.pdfIn PDF document text
    • http://lowufadit.scienceontheweb.net/fazofelopat.pdfIn PDF document text
    • http://zisapawiwako.mypressonline.com/97318781451.pdfIn PDF document text
    • http://levojefozaloro.mywebcommunity.org/surah_al_yasin_download.pdfIn PDF document text
    • http://dimopun.mywebcommunity.org/importance_of_small_business_in_the_south_african_economy.pdfIn PDF document text
    • http://jorolog.22web.org/answer_in_genesis_coupon_code.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481055/normal_5fe3b9f856f74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443799/normal_5fcc45688c27b.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/moxavomiwanak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459170/normal_5ff5880987933.pdfIn PDF document text
    • http://buwubaled.mywebcommunity.org/rawukikefoxixep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nufewusuk.rf.gd/nigifopejibivapoxeliniso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff7147e5-d246-45ff-9014-c1904cca9db4/introduction_to_information_systems_7th_edition_free_download.pdfIn PDF document text
    • http://zonafikepejese.onlinewebshop.net/where_is_kathie_lee_gifford_today.pdfIn PDF document text
    • http://nabotiwufonego.epizy.com/42926603740.pdfIn PDF document text
    • http://dupesikunafi.rf.gd/power_cooker_pressure_cooker_manual.pdfIn PDF document text
    • http://ladisopezaxak.epizy.com/57222805785.pdfIn PDF document text
    • http://jujalun.rf.gd/zijulopivoxabefu.pdfIn PDF document text
    • http://gokutirimavav.rf.gd/how_to_fix_samsung_top_load_washing_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f16b829a-6e9d-4ff0-a9f6-f0a69cbf6329/personajes_de_la_obra_la_ciudad_y_los_perros_de_mario_vargas_llosa.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_off00013fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FCD 5720 bytes
SHA-256: 19d147640a568fe9b8d3d3e91002413f148426769de94d86e735c0843da8b124
font_01_sfnt_off00015327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15327 12468 bytes
SHA-256: 9691f36fd072a4ef59b8b39865971298f622ad4e3f612b3e203551a719b3ad1d
font_02_sfnt_off00017cc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CC8 16060 bytes
SHA-256: c43c81af3addadc619f1b50b0eb79006c69e58cb90abf43f7a5fbd940e22698c