Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2870ae7eaef771a…

MALICIOUS

PDF

75.0 KB Created: 2021-03-07 12:44:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 595d78f90531acaf2f64ecd75898ab98 SHA-1: dd2025a3a388693461305a9caec8d2c67e64f6fa SHA-256: f2870ae7eaef771a639fa2336c54563e1ae959c18ef6375fdf9032e32b7587d0
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://kuzutuzo.ru/strik?utm_term=do+rice+noodles+have+less+calories PDF link annotation
    • https://cdn.sqhk.co/kejopala/hit2ghG/wojifasovawobusa.pdfIn PDF document text
    • http://timelessdecorum.com/nujawatawosuxubeku4gzv3.pdfIn PDF document text
    • http://aslixan.com/42744744785mkovm.pdfIn PDF document text
    • http://closemaze.com/physics_class_9_motion_notesa2z8w.pdfIn PDF document text
    • http://silikidabog.22web.org/45510687778.pdfIn PDF document text
    • https://cdn.sqhk.co/juvebuzizej/ghi2ijo/pewdiepie_tuber_simulator_cheats_download.pdfIn PDF document text
    • http://stat-index-co.com/what_does_service_stabilitrak_mean_on_a_cadillact3o0l.pdfIn PDF document text
    • http://peludofnor.fun/easy_recharge_vodafone_50y5dra.pdfIn PDF document text
    • https://cdn.sqhk.co/pozedezupase/SdjcNhe/67052673017.pdfIn PDF document text
    • https://cdn.sqhk.co/xoberuweri/njiggdo/nasa_hoodie_white.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://topawod.epizy.com/meganthi_circus_1080p_video_songs.pdfIn PDF document text
    • http://xarajadumep.epizy.com/calories_in_starbucks_matcha_latte_with_oat_milk.pdfIn PDF document text
    • https://8b8c7005-3af0-45a1-8e5b-a6902caa9335.filesusr.com/ugd/dbd7d9_cdf65892e0bf482ba00fc7bb2312e51c.pdf?index=trueIn PDF document text
    • https://35548484-ce42-4b18-9d9d-834326683263.filesusr.com/ugd/a221b6_05de72493fe047d3b401d551ed413fca.pdf?index=trueIn PDF document text
    • http://zuvaxideta.rf.gd/what_time_period_does_ancient_history_cover.pdfIn PDF document text
    • https://307a23dc-bb60-4906-9a68-69e45957aa19.filesusr.com/ugd/d2057d_9cac23ef700e4c5c90bc552b1bc0340e.pdf?index=trueIn PDF document text
    • https://72dfff08-f6cb-4f5d-aaac-ebe71175d6a6.filesusr.com/ugd/c268f7_215b742b613f41f086bc77240ee4fe36.pdf?index=trueIn PDF document text
    • https://d1b33a7b-cde1-45d4-bc15-d4d3b6236ac5.filesusr.com/ugd/1d64af_ac806fc41f6f44d2a396b55a4ac9530b.pdf?index=trueIn PDF document text
    • http://wiwawilif.epizy.com/sig_sauer_p938_leather_paddle_holster.pdfIn PDF document text
    • https://348ddb29-83e1-4812-94a1-743b72ef9b42.filesusr.com/ugd/23b571_df0eb27c759a45da9bac4b0a9cb31d08.pdf?index=trueIn PDF document text
    • http://keruxenuriwi.epizy.com/kefejajetabizogajipivu.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_off0000e8e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E6 5088 bytes
SHA-256: c02439ff5f4855f625f75fdc1ce26982ea57f78d693f13142e283fa4c7566f09
font_01_sfnt_off0000fa31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA31 10716 bytes
SHA-256: e75aedf9e32571190e75c6da993846822865a673c5e569c1664248d6166824cd

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