Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2b5ef6283e05db3…

MALICIOUS

PDF

78.7 KB Created: 2021-05-11 22:24:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4b3d8f6c3429d277cac6677c7c28986c SHA-1: 79d316def97a746f34acb09daa7cc2b434f7e592 SHA-256: d2b5ef6283e05db303b2a67cd6dcad15d2233c6aca6a927f123f08c601dde495
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary external URI pointing to 'nipisod.ru'. This URL, along with others, suggests a phishing or link-farming operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://nipisod.ru/strik?utm_term=what%2527s+the+best+comcast+package PDF link annotation
    • https://tuzutetenufiro.weebly.com/uploads/1/3/4/7/134716615/guwivonupekos_womazezotum_weloso_fizopekofij.pdfIn PDF document text
    • http://copyright-infringement.business/my_name_by_sandra_cisneros_tone42crr.pdfIn PDF document text
    • http://rawenspant.online/dantes_inferno_summary_litcharts0bh89.pdfIn PDF document text
    • https://cdn.sqhk.co/vatuliwa/ih0idAL/93187220681.pdfIn PDF document text
    • http://vk-settings-change.online/meluvuriwobofimrg14i.pdfIn PDF document text
    • https://cdn.sqhk.co/xedogigiloli/c4VggOG/63671604570.pdfIn PDF document text
    • http://hookup753.fun/8085264391fqjom.pdfIn PDF document text
    • https://cdn.sqhk.co/baxalelizop/hjhhgif/resident_evil_3_mods_bikini.pdfIn PDF document text
    • https://renokogepebamon.weebly.com/uploads/1/3/2/6/132696434/7254972.pdfIn PDF document text
    • http://bapulesaj.mygamesonline.org/rifisidog.pdfIn PDF document text
    • http://tevfikyuce.xyz/dotugacltd2.pdfIn PDF document text
    • https://vawuwoteb.weebly.com/uploads/1/3/0/9/130969488/3197698.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/jathiji/tigesavezodavawazezodoju.pdfIn PDF document text
    • http://btsworld.org/char_broil_quickset_grill_manualcs113.pdfIn PDF document text
    • https://gejidodedawo.weebly.com/uploads/1/3/4/0/134018108/gokobanufelobu.pdfIn PDF document text
    • http://uablog.website/leadership_skills_resume_phrases_exampleslk6mk.pdfIn PDF document text
    • https://cdn.sqhk.co/matikefateri/pjfhiRt/top_interior_design_blogs_uk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dcd917b-e0cf-4814-9171-dcdec8a75d68/71257566592.pdfIn PDF document text
    • http://xotaferuju.myartsonline.com/wazikelitefumosutuzol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2e7c9e7-8e54-40c0-8450-20dba7ba10b4/radius_of_convergence_taylor_series.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cf436d5-04db-48b8-b541-7a1928c17bae/gubofutodaze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2b6a9ae-a1a5-4040-a89b-257185ebfa0e/english_grammar_lesson_plan_for_grade_9.pdfIn PDF document text
    • http://luxupovokajaf.onlinewebshop.net/ms_window_grill_design_catalogue.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE34 5472 bytes
SHA-256: fdc5d81ed8c9ac5aee653c4b69c7189bb44f6049ebf7149551b4a099402a22c6
font_01_sfnt_off000100b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B6 1796 bytes
SHA-256: c9c850e9c351ce199d5e9d1c42a783cd39d33267a74ccb43d8a2fed304f07254
font_02_sfnt_off00010941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10941 10408 bytes
SHA-256: ec99e21169fa9f378b2859d5bc60eda490f89df28138b2a11274d0967d992fc4

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