Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9b5b95ccf91ae0c…

MALICIOUS

PDF

75.6 KB Created: 2021-03-28 13:38:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 9f2e8982f84342f0ae4186de66a5e97f SHA-1: 5cd9f66d584db0f3a1ee660dfd3a8e223be853c7 SHA-256: d9b5b95ccf91ae0c6c0d53067da0981abf90c5704e161434a2008cf0cd6c34aa
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a deceptive title, indicating a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wix?keyword=feature+comforts+space+heater+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4457008/normal_5fc7207fec465.pdfIn PDF document text
    • https://cdn.sqhk.co/pelotuwew/eTlsXjj/c_windows_form_application_example.pdfIn PDF document text
    • http://molotkov.site/cisco_200_301_book_volume_22ilxk.pdfIn PDF document text
    • https://cdn.sqhk.co/judigirowe/FAjbYVL/ocarina_sheet_music_zelda.pdfIn PDF document text
    • http://pinerapidsrr.com/glencoe_health_textbook_freexfla9.pdfIn PDF document text
    • https://cdn.sqhk.co/fegujajox/gdaiaij/nisimigin.pdfIn PDF document text
    • http://mosdendy.store/400349773400yn1u.pdfIn PDF document text
    • http://cyberghost.store/kikizewuxikeguprfbu.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/ijiicjw/pufawosazupugugigenesej.pdfIn PDF document text
    • https://cdn.sqhk.co/rudolikube/ii5hihg/sepalivelexomaxogipu.pdfIn PDF document text
    • http://toguvuveleguna.22web.org/13580359393.pdfIn PDF document text
    • https://cdn.sqhk.co/xasexuwosul/uifjfge/79012585995.pdfIn PDF document text
    • http://fastnoutservice.ru/que_es_un_retrato_escrito_y_sus_caracteristicasiai8r.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://help-igcopyright.xyz/medical_english_conversation02bzp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5fdb096076914.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jovigoxuja.epizy.com/killer_bean_tamil_movie_hd.pdfIn PDF document text
    • http://kejinimijenemav.epizy.com/vezenewumisagafirofuride.pdfIn PDF document text
    • http://jokosalona.epizy.com/cmake_user_guide.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_off0000e960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE960 5208 bytes
SHA-256: 7a8095ccc5b0f393ed6451564adc8ea82ee781b0193217e764151ac70e63d5ee
font_01_sfnt_off0000faf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF3 10600 bytes
SHA-256: e49977aa624940f58ff3e7d9a0354e47b804637f6ab2b5fc8fa5e7255cdb3550

Open this report in the interactive analyzer, or submit your own file for analysis.