Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4f0507514ae126c…

MALICIOUS

PDF

85.7 KB Created: 2021-03-29 01:12:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 592f23289b078d3008304cbfa5ba24df SHA-1: 998ca41e494c59fd888956d0cd6ffc11b2e528dc SHA-256: d4f0507514ae126ce2c287fda320db6471e8b0b246626bc6979c4499330c719a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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://pelibifir.ru/award?keyword=apprendre+espagnol+d%25C3%25A9butant+pdf PDF link annotation
    • http://groshyk.site/wijejimub9rfk.pdfIn PDF document text
    • http://shoop-fh.ru/bts_answer_album_purchasedrvxo.pdfIn PDF document text
    • http://center-about.com/werezutepod443i.pdfIn PDF document text
    • http://endi-itali.space/distribucion_de_poisson_ejercicios_resueltosnbpw1.pdfIn PDF document text
    • http://helplnstagramcontact6088757.com/siemens_rdj10rf_thermostat_control_instruction_manualu3i3b.pdfIn PDF document text
    • http://aires.fun/which_mini_14_to_buyg4xz0.pdfIn PDF document text
    • http://idealslimitaly.site/how_much_does_slot_machine_costignmm.pdfIn PDF document text
    • http://remastacer.com/multicolor_hexagon_floor_tileqn1hc.pdfIn PDF document text
    • http://cancandance.org/demography_and_social_statisticss50sd.pdfIn PDF document text
    • https://rimudidux.weebly.com/uploads/1/3/4/5/134597050/9d33f9.pdfIn PDF document text
    • http://hot-money.fun/bapaxogelebebavat642u.pdfIn PDF document text
    • http://lnstagram-helping-centre.com/how_deep_do_rabbits_burrow9c42l.pdfIn PDF document text
    • https://levapexufusetij.weebly.com/uploads/1/3/4/9/134904519/4730238.pdfIn PDF document text
    • http://nuverlites.online/juvulonubikuxuki2h71z.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f227e6d-2013-427a-9be2-4c9736a60783/22619413032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be8017cf-7e2d-4fb9-8654-8f72373ddf5b/grohe_shower_valves_repair.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/794a3c5f-8503-484d-9d46-adfae37f1862/far_side_of_the_world_lyrics_buffett.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/auditor_s_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/keerthi_suresh_photos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53b58596-092d-43ea-b665-d9bfb85440a1/1994_polaris_sportsman_400_parts_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/panakebidenitobof.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_off0001033e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033E 5480 bytes
SHA-256: 3858d51ffea2da5215a16664babfc94d8486e784b57abb4f87bba8f4340a147d
font_01_sfnt_off0001159d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1159D 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off00011e2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2B 13600 bytes
SHA-256: 227a50ec26428087838aa3fb1ed3fdc10dce10ba6ab4383ae943f4ab3b3f5afd

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