Malicious PDF — malware analysis report

Static analysis result for SHA-256 43cfe62417683bdb…

MALICIOUS

PDF

74.8 KB Created: 2021-03-31 20:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8f97ac81d183fba9f549b84997e6d781 SHA-1: 545c17723c833f93f2ca1e0487686becb6ab8f42 SHA-256: 43cfe62417683bdbe60c64850ad5301ad27dec55831c1a7093cdfe3dff324bbe
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://maypoin.ru/award?keyword=addition+connectors+exercises+pdf PDF link annotation
    • http://xijonofupawulo.mypressonline.com/assessment_strategies_for_teachers.pdfIn PDF document text
    • http://jiwabozaxexe.mypressonline.com/dipaji.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/orbit_57896_wiring.pdfIn PDF document text
    • https://cdn.sqhk.co/poturofivat/jakjhgd/76354466838.pdfIn PDF document text
    • http://jidameke.mypressonline.com/office_administration_duties_and_responsibilities.pdfIn PDF document text
    • https://cdn.sqhk.co/kunawako/WgfDajy/auto_record_all_calls_android.pdfIn PDF document text
    • https://cdn.sqhk.co/vixemujomu/jiwoOji/24251344965.pdfIn PDF document text
    • https://cdn.sqhk.co/xavexapoxiv/UZfmfjc/jelupilugibov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/oracle_forms_forum_arabe.pdfIn PDF document text
    • https://ac3db616-04cb-40f1-8357-c67041f5e20c.filesusr.com/ugd/eda9ba_b05ffe1b3bfa40c29998cc5cb3ee34a1.pdf?index=trueIn PDF document text
    • https://80c8fd16-4cf8-4f9f-b52b-d6c956df8f3b.filesusr.com/ugd/1a94e8_71bc3dcf54be40618c29993ad43cc6ed.pdf?index=trueIn PDF document text
    • http://vowafixugologu.epizy.com/esl_pronunciation_exercises.pdfIn PDF document text
    • http://sefowolo.atwebpages.com/equations_of_motion_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/22817638474.pdfIn PDF document text
    • http://lonopisok.epizy.com/bag_man_full_movie.pdfIn PDF document text
    • https://5a1138df-423b-4a5d-a7c7-36223740754e.filesusr.com/ugd/a72fa8_4a61de042b0f4a1fa2d87004244f0243.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/98909989934.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/vw_polo_2015_service_manual.pdfIn PDF document text
    • http://wexaxota.epizy.com/larusolixenamojep.pdfIn PDF document text
    • http://valamujunitun.epizy.com/74463548322.pdfIn PDF document text
    • http://talakukatutevib.epizy.com/confirm_receipt_email_template.pdfIn PDF document text
    • https://d0fd53c2-66a5-49f7-a942-a4bfc50892a3.filesusr.com/ugd/11baf9_72068006895948578020a66191042aad.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/gejavasuxozurese.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_off0000e860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE860 4964 bytes
SHA-256: 075bd375e42914f30051c563dcaff6fc504b23d768c6d271944a3e6cbce671f3
font_01_sfnt_off0000f95e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95E 10740 bytes
SHA-256: 20c3729093d1096b4cf0891f2072714b9374903a052a37e5ee77fe0c824d6639

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