Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ded41245328b50…

MALICIOUS

PDF

80.2 KB Created: 2021-03-28 12:25:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: b0532f15d414331f0dd267c0825ee7ab SHA-1: df2e1465f4ea56efc97e895f7a24665d90cdedc8 SHA-256: e5ded41245328b50df99aea607ad6a95c5d5cbef4d3a55b6d8e5c81b1f7405e2
126 Risk Score

Malware Insights

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

The PDF file contains numerous links to disposable domains, many of which are designed to mimic search results or document downloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs and the PDF's structure suggest an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://lozipotod.ru/strik?utm_term=how+often+does+a+2018+nissan+sentra+need+an+oil+change PDF link annotation
    • http://xufamorazogubov.sportsontheweb.net/34648650829.pdfIn PDF document text
    • http://wivaserana.mywebcommunity.org/aircraft_maintenance_engineer_course_in_pakistan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373511/normal_60175439ebd80.pdfIn PDF document text
    • https://cdn.sqhk.co/zejizoguzut/ibNDggT/pac_learning_example.pdfIn PDF document text
    • http://about-central.com/cabrio_washer_service_manualnu4mh.pdfIn PDF document text
    • http://film123watch.com/725531743257noiz.pdfIn PDF document text
    • https://cdn.sqhk.co/serojimo/AgfIgeC/ronikizarogunepela.pdfIn PDF document text
    • https://cdn.sqhk.co/wugeguxu/gjVq1Gw/online_senet_doldurma.pdfIn PDF document text
    • https://cdn.sqhk.co/dewufidabo/el5ihzv/zavanakegujaradozobuju.pdfIn PDF document text
    • http://clubstore.info/highway_traffic_racing_3d62tfh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447436/normal_602380d6eeed8.pdfIn PDF document text
    • http://autocredit.moscow/mewopopajamatomikezewopoly0sc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422894/normal_5ff0b50568e6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387573/normal_60087fb6561da.pdfIn PDF document text
    • http://zogometemo.sportsontheweb.net/guitar_blues_scale_diagram.pdfIn PDF document text
    • http://organic100.fun/writing_contests_2020_no_entry_fee9m5l0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460706/normal_6028e3ff2b75d.pdfIn PDF document text
    • http://lulopoboxefon.scienceontheweb.net/33626483138.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://83d12552-0bc1-4415-b221-1da25caacb9b.filesusr.com/ugd/1e11d0_a244665e24af4a3fbcd5d98ee3108262.pdf?index=trueIn PDF document text
    • https://1a9cd40a-f0d6-44d4-a143-19288280ca2b.filesusr.com/ugd/7a13df_7d7bd6e57e9e472aa46b37e43d3dee1a.pdf?index=trueIn PDF document text
    • https://d2ffd92d-ad89-4e9b-8359-126286817a3c.filesusr.com/ugd/dd9784_a319e2e5bc2842cca16d813ec3f942d6.pdf?index=trueIn PDF document text
    • https://369206df-e466-4f8f-9771-850d1edb33c5.filesusr.com/ugd/8fd5dc_ae1c95cb42a24ace9889f2f89604be76.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2B 5644 bytes
SHA-256: 69201aaf514eb41f0caad685443b4708a0a2e46494649601b7f4887dc7ed7dfe
font_01_sfnt_off0001006f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006F 10544 bytes
SHA-256: cab4e17f3c4211834d2a64b72cd12ab24ecff4d12a258b6d244d647fde20fe75
font_02_sfnt_off00012471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12471 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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