Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b9d3157a36dedd3…

MALICIOUS

PDF

71.3 KB Created: 2021-02-21 02:16:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: b567ffee78a94107e34c730e9a7cb5e1 SHA-1: 5d4219a8f0342491d65abfddd38d40e570483e12 SHA-256: 1b9d3157a36dedd3aa2922c63ebba8b13d34788b00658fb144d87c350c38ae82
224 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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://crophysi.ru/wix?keyword=pis+2019+e+2020+calendario In PDF document text
    • https://cdn.sqhk.co/nuleneru/GPgfPAr/cash_n_go_title_loans_piedmont_sc.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuditifu/ejihjds/human_life_cycle.pdfIn PDF document text
    • http://detonicro.website/why_has_my_wireless_keyboard_and_mouse_stopped_working164h8.pdfIn PDF document text
    • https://cdn.sqhk.co/kakumipoman/gjfpwos/toxawuvuvu.pdfIn PDF document text
    • http://mafonofolifeda.22web.org/container_inventory_sheet_army.pdfIn PDF document text
    • http://cosmicgig.com/momofuku_milk_bar_birthday_cake_truffles_recipe92vj2.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/idgiVhf/lelifutasoxeze.pdfIn PDF document text
    • https://cdn.sqhk.co/gorisaburo/fgfDnib/on_the_q._t._crossword_8.pdfIn PDF document text
    • http://about-central.com/kagugivabererifakidatababqbr9p.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/beiijjA/marble_machine_x_cad.pdfIn PDF document text
    • http://puxeguka.iblogger.org/provisional_admission_letter_format.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jeleruvimubag.rf.gd/95333890519.pdfIn PDF document text
    • http://rogasubuli.rf.gd/78220274732.pdfIn PDF document text
    • http://mobisojew.epizy.com/android_apps_apk_play_store.pdfIn PDF document text
    • http://dipomik.epizy.com/punize.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_off0000d8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B8 5416 bytes
SHA-256: 41352ca3a7bcebc84e10313c72f013a1554917739924d5fa235d96ec8c6e2f19
font_01_sfnt_off0000eb34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB34 11800 bytes
SHA-256: 7d83d925b61718d33a8e47641ce7354b4c77a0bbaaadfc46e22afb1327895c50