Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d50718c2dad8542…

MALICIOUS

PDF

96.0 KB Created: 2021-05-12 05:01:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b7ac0a2b17b0485d7b351ae4432388bd SHA-1: 736197e3939016aabc3a10fdcdb10aaee0e9ef29 SHA-256: 9d50718c2dad8542184103d5290aee5fe9975b876e378be3df7d934b941f977e
166 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or credential harvesting attempt. The 'SE_MFA_LURE' heuristic strongly suggests the document is designed to trick users into providing sensitive information like one-time codes or MFA approvals. The presence of numerous external URLs, including one pointing to 'soxebez.ru', further supports the phishing lure, likely directing users to a page designed to steal session tokens or credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://soxebez.ru/strik?utm_term=reinforcement+concrete+design+formulas PDF link annotation
    • https://cdn.sqhk.co/xolofiwano/Ugjijgc/53922563062.pdfIn PDF document text
    • http://leopards.space/decimal_word_problems_4th_grade_worksheetsjxqdt.pdfIn PDF document text
    • http://vinorama.fun/history_of_atomic_theory_chart_answer_keyytlvm.pdfIn PDF document text
    • http://gifozizonumili.iblogger.org/haier_portable_air_conditioner_reviews_10000_btu.pdfIn PDF document text
    • https://cdn.sqhk.co/kefexunas/uMieAji/zugipoliveriki.pdfIn PDF document text
    • http://zumedemuruva.22web.org/78251100069.pdfIn PDF document text
    • http://nubigawe.22web.org/47852273965.pdfIn PDF document text
    • https://cdn.sqhk.co/lukumuzu/gdhe1Ch/flying_arrow_game_world_record.pdfIn PDF document text
    • http://beautysss.site/54268720859btn7v.pdfIn PDF document text
    • https://cdn.sqhk.co/nupasoxure/Hgdhhgg/mefanul.pdfIn PDF document text
    • http://price-list.moscow/wigewedelojawisadiwafotku6nx.pdfIn PDF document text
    • http://giwidesavezur.22web.org/how_to_find_my_blizzard_authenticator_code.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/iciexje/24959588156.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
    • https://ee67c5b3-b4d3-4257-b425-af55881d3a68.filesusr.com/ugd/c60da7_ea2e2caf670d4fb798d3c7d25826b512.pdf?index=trueIn PDF document text
    • https://083189c9-8220-4687-a375-57be19a37228.filesusr.com/ugd/909b15_ac069b1a2bc6432baa38246370eadd3b.pdf?index=trueIn PDF document text
    • http://rodiwube.epizy.com/mododujomewu.pdfIn PDF document text
    • http://tibugesifavetel.epizy.com/zorewifutejutexu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/327ec322-ca0f-4f1e-9551-01c31c7b036c/pema_chodron_when_things_fall_apart_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22358dd8-6cdd-49ad-b77a-80a54921481c/libro_de_espaol_lecturas_tercer_grado_de_primaria_1993.pdfIn PDF document text
    • http://dipomik.epizy.com/77374563008.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F20 5232 bytes
SHA-256: 01146ff7edbcff4e611fc548f23cc080d65e180bc3eeb5e0fc70e21d9090ff6e
font_01_sfnt_off000120d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D1 13524 bytes
SHA-256: ad6701cd13b754ca512db8f81d37f5c06d39ba4213034f018625c1b6f732c316
font_02_sfnt_off00014f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F14 16036 bytes
SHA-256: 35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f
font_03_sfnt_off0001637e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1637E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34