Malicious PDF — malware analysis report

Static analysis result for SHA-256 469a2cf59b0297b6…

MALICIOUS

PDF

73.5 KB Created: 2021-03-12 10:07:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f1a9587a22ba50d14f990f5710b27d57 SHA-1: 2fc7289fa7e6edd04d56f6cd94160c7c3dbb2407 SHA-256: 469a2cf59b0297b633ade4efa0ecffaee42a8b43a122dfeeeed8e82d5c717803
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, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with the primary one being 'https://maypoin.ru/strik?utm_term=how+to+treat+cat+wounds+with+maggots', suggesting a phishing or malware distribution lure. The presence of multiple disposable hosting links further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=how+to+treat+cat+wounds+with+maggots PDF link annotation
    • https://cdn.sqhk.co/busanurutar/ifijdy4/topitugemezepejabi.pdfIn PDF document text
    • http://jifixadilo.22web.org/wuvabur.pdfIn PDF document text
    • https://rajevolid.weebly.com/uploads/1/3/0/8/130813967/bewapeletepisawurazo.pdfIn PDF document text
    • https://cdn.sqhk.co/tovozovuzedu/j647hdU/basketball_game_length_uk.pdfIn PDF document text
    • https://foluxafan.weebly.com/uploads/1/3/5/3/135397430/japijojuxamizuz.pdfIn PDF document text
    • https://tatazopizen.weebly.com/uploads/1/3/1/1/131163492/5871191.pdfIn PDF document text
    • https://cdn.sqhk.co/vomifavafo/4PAEbOG/soul_hunters_pork_chop_pets.pdfIn PDF document text
    • https://sadavofabuloxus.weebly.com/uploads/1/3/5/3/135316226/1257254.pdfIn PDF document text
    • https://vebavorosufate.weebly.com/uploads/1/3/4/7/134742301/vupulosusukodijefaw.pdfIn PDF document text
    • http://vashobereg.com/26799926386v4d47.pdfIn PDF document text
    • https://pisisixiva.weebly.com/uploads/1/3/1/6/131636779/4b7d01605977.pdfIn PDF document text
    • http://propovar.ru/oxford_english_grammar_book_for_class_7_solutionsz7vvp.pdfIn PDF document text
    • http://winoorama.website/dedugetibalufuxojepifujz9z4.pdfIn PDF document text
    • https://tupusedaluniji.weebly.com/uploads/1/3/0/7/130738871/nutukimojukeziw_rijewiwukup_pefegobinudef.pdfIn PDF document text
    • http://rusakova.space/61378080566ntwxd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://poberebom.epizy.com/interview_with_the_vampire_quotes_claudia.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/9948040367.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/hbr_emotional_agility.pdfIn PDF document text
    • http://retudazugo.rf.gd/rodexurafanoduseb.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/outlook_app_calendar_notifications_android.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/contemplated_verb_synonym.pdfIn PDF document text
    • http://nisebot.epizy.com/atomic_structure_free.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_off0000e32c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32C 5372 bytes
SHA-256: 5fb1fd22774f7de5067bb2f87ffc7a090b3dd8e0c98a3338c31315b5326816ca
font_01_sfnt_off0000f552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF552 10340 bytes
SHA-256: becdf353136f73044625af9a3e77f53e8deee4a47ee2bae47ea828460e5a50d6

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