Malicious PDF — malware analysis report

Static analysis result for SHA-256 83576f5503641669…

MALICIOUS

PDF

76.7 KB Created: 2021-03-22 17:52:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ae687245b576deb854394ff653ca049f SHA-1: 3ee0ce7d4fcff5af754005d043f2d97b3f8cf07e SHA-256: 83576f550364166903a46a503081ab225c5590bc0cebdc101456cf41bdcb1e72
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 0.9996

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://vilenefex.ru/strik?utm_term=comcast+cable+box+not+showing+picture PDF link annotation
    • https://jenisevemib.weebly.com/uploads/1/3/1/0/131070602/tinuwo-wajesusa-rexanexar-zofawoxow.pdfIn PDF document text
    • http://brettlockhart.com/bigo_live_connector_for_ioscjg53.pdfIn PDF document text
    • http://optamorem.com/fujica_auto_5c168j.pdfIn PDF document text
    • http://domavera.ru/padafci0ke.pdfIn PDF document text
    • https://wanowozuvigamo.weebly.com/uploads/1/3/0/7/130738859/1731474.pdfIn PDF document text
    • http://vkrowl.com/22743275724gdqgv.pdfIn PDF document text
    • http://nubolats.xyz/how_to_write_a_tv_script_wikihowgwqew.pdfIn PDF document text
    • http://macsk.space/buku_filsafat_pendidikan_islamt9puo.pdfIn PDF document text
    • https://dobetabuzaduguz.weebly.com/uploads/1/3/5/3/135312815/5040081.pdfIn PDF document text
    • http://moitender.org/kogalidojujij5w6gv.pdfIn PDF document text
    • http://urologo.store/why_is_my_sewing_machine_not_catching_the_bottom_threadjl3e7.pdfIn PDF document text
    • http://redita.fun/75354991716mw1ub.pdfIn PDF document text
    • http://momentshop.website/snowfight._io_crazy_gamesm806h.pdfIn PDF document text
    • http://verifiedbadge-lnstagram.com/harry_styles_album_zipu65qn.pdfIn PDF document text
    • https://tokemenar.weebly.com/uploads/1/3/4/3/134337898/1590025.pdfIn PDF document text
    • http://ogranifruit.space/allen_bradley_plc_datasheetslp77.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://58fabbca-0322-4868-a582-948aa19840f9.filesusr.com/ugd/93748c_eecadb092c574a6aa7280c7d5cfae5a4.pdf?index=trueIn PDF document text
    • http://tixixomevupot.rf.gd/monitoring_evaluation_and_learning_tools.pdfIn PDF document text
    • https://ce5d016b-e5fb-4004-af8f-35f61b829e22.filesusr.com/ugd/d7d7f8_b46ac1af6ee246a4897eba36b7a27753.pdf?index=trueIn PDF document text
    • http://sawuliwinupunud.epizy.com/gorukipavulemorukazofik.pdfIn PDF document text
    • http://zozemuki.rf.gd/17810810008.pdfIn PDF document text
    • http://wolemesi.rf.gd/45363375272.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE02 5552 bytes
SHA-256: f5bd83dfaf9883c4a95b5686bfb505105de2b86ee1fb6169057fc7095dc78ac5
font_01_sfnt_off000100ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CA 10768 bytes
SHA-256: 6b6fb9321ddfa1983380e2e9f8d22242438678ae09d535619a70fcae162505cd

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