Malicious PDF — malware analysis report

Static analysis result for SHA-256 e236d27dda466c17…

MALICIOUS

PDF

77.9 KB Created: 2021-02-16 02:40:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: d4b6a7feceacd92a13a9e7edca909d83 SHA-1: 75e225df0e9d7ea8c72d3c121e7b7aef1224bf14 SHA-256: e236d27dda466c17777854da6a0d1393f89ae92fb1fd413427cde5016fde7f4a
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable hosting or redirectors, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the document as a link farm on disposable hosting, reinforcing the malicious nature.

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=what+is+a+supramax+bulk+carrier PDF link annotation
    • https://cdn.sqhk.co/kuvuwisarov/xMdicih/jigitil.pdfIn PDF document text
    • http://chelamela.org/pure_imagination_sheet_musicm71ga.pdfIn PDF document text
    • https://cdn.sqhk.co/tavaxikanabu/EjeKiah/rukugar.pdfIn PDF document text
    • https://cdn.sqhk.co/nomavunut/cifrfhi/get_fast_likes_followers_views.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/cZAhche/skyrim_summon_dragon_priest_spell.pdfIn PDF document text
    • http://converstarget.ru/10.sinif_fizik_kitabi_indirtu23u.pdfIn PDF document text
    • https://cdn.sqhk.co/muwazubivotu/WAAGgd1/free_casino_slots_games_with_bonus_rounds.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/8243iiD/69398410623.pdfIn PDF document text
    • http://legko.travel/82971160399ukjy5.pdfIn PDF document text
    • https://cdn.sqhk.co/libabafo/mXEpgdr/bombastic_sentences_for_introduction.pdfIn PDF document text
    • https://cdn.sqhk.co/dojoxuwote/shjdjfl/64456917540.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://vinixozu.rf.gd/android_tv_remote_app_failed_to_connect.pdfIn PDF document text
    • http://vezavajizuvos.epizy.com/android_9_lg_g6_features.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/linguisystems_guide_to_communication_milestones.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/30083607077.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/tutorial_autocad_electrical_2018_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/4990995800.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/immunization_exemption_form_mn.pdfIn PDF document text
    • http://limixumijegaf.epizy.com/camber_caster_toe_in_toe_out.pdfIn PDF document text
    • http://xidatozekef.epizy.com/46927928450.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/kepatigedakikimarikote.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_off0000e644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE644 5124 bytes
SHA-256: 3a00561e01da0b4652ce64d7ba257a8b70800ac183ae3939c66fbb7b4adf274e
font_01_sfnt_off0000f7b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B9 10656 bytes
SHA-256: 3df1741bbd15ab3ee5ae6f2b2ac60f49eb46c72f7806a4231808fc17ba478cd0
font_02_sfnt_off00011bdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BDF 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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