Malicious PDF — malware analysis report

Static analysis result for SHA-256 abfb8c7dde963c74…

MALICIOUS

PDF

98.2 KB Created: 2021-02-19 06:52:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8022309764bf640e7064aec27ca06cce SHA-1: d41212aeedaf4f5724d3b26bc901c4184640e15f SHA-256: abfb8c7dde963c74963a9d86dee77476d28da9d20eaba0ca1818ce223d9c5c0a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/strik?utm_term=english+rhymes+paris PDF link annotation
    • http://onlinesos.tech/32973069988u5whc.pdfIn PDF document text
    • http://1xbet-registrat.site/neca_manual_of_labor_units_2019bt8r4.pdfIn PDF document text
    • http://fevajubinijexaz.iblogger.org/cannels_bordelais_form.pdfIn PDF document text
    • http://zomuregunaradu.iblogger.org/brennenstuhl_timer_manual.pdfIn PDF document text
    • http://tesezemav.iblogger.org/mekijatofolijojatufu.pdfIn PDF document text
    • http://vodoroding.info/apollo_13_bookxj02d.pdfIn PDF document text
    • http://dapabikokewe.iblogger.org/btd_battles_hack_apk_ios.pdfIn PDF document text
    • http://lianhua.life/ccleaner_pro_apk_terbaruoc8nr.pdfIn PDF document text
    • http://gikewoxetid.iblogger.org/kibuzidanutopotediraka.pdfIn PDF document text
    • https://buserakufazuwus.weebly.com/uploads/1/3/4/0/134097478/16a24.pdfIn PDF document text
    • http://fezivexem.iblogger.org/81133521097.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
    • http://dogirajuwuxo.epizy.com/les_champs_elysees_piano_sheet.pdfIn PDF document text
    • http://demoxivefuwuvi.rf.gd/android_app_maker_free_software.pdfIn PDF document text
    • http://sawopirorafo.rf.gd/glioblastoma_multiforme_stage_4_final_days.pdfIn PDF document text
    • http://mujunuge.rf.gd/50693540231.pdfIn PDF document text
    • http://pakoxerevigere.epizy.com/sizebekufabepewalotobax.pdfIn PDF document text
    • http://repafow.epizy.com/pdf_file_software.pdfIn PDF document text
    • http://fudotebu.epizy.com/sunikakapegoro.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_off00012165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12165 4888 bytes
SHA-256: 3a4531ad823788c9aa3196d7fadb8fd26bdcae5613653dd271795022084c82cb
font_01_sfnt_off000131c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131C3 11984 bytes
SHA-256: 0797733bc807e0497cfcfe5f9686697f7180f6c904f93b849859dc0a358082c9
font_02_sfnt_off000157e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157E5 16248 bytes
SHA-256: 7f10b5217708b7aced76a9c7cd02a51188d2af7235ea23585d094f6560042d0f
font_03_sfnt_off00016d38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D38 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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