Malicious PDF — malware analysis report

Static analysis result for SHA-256 09262cda654d73cc…

MALICIOUS

PDF

69.5 KB Created: 2021-03-29 21:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ba7ea31d3bc7c2958f5e0ffffd41f2fc SHA-1: c6b5dbb6d604b431da5e37dc0b2185268f92493d SHA-256: 09262cda654d73cc208e6f29051e20fa7665c0f4979e732a8d6624b80223cc45
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9991

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/award?keyword=icao+annex+10+volume+iv+pdf PDF link annotation
    • http://dilogipusatix.22web.org/24516596639.pdfIn PDF document text
    • http://sitajejo.22web.org/sociology_theories_of_education.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xakodalomidu.rf.gd/dajifigig.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/12560137900.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/how_to_change_battery_in_vivofit_jr_2.pdfIn PDF document text
    • http://zadaxuro.rf.gd/16425043825.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/gawotumiderumavevituses.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/cronica_de_una_muerte_anunciada_resumen_breve_por_capitulos.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/que_es_aforismo_ejemplos.pdfIn PDF document text
    • http://kunegozaribop.epizy.com/statistical_quality_control_mahajan_download.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/bad_blood_lyrics_song.pdfIn PDF document text
    • https://5634f520-c25d-421d-ab67-3d94505d13cb.filesusr.com/ugd/1b85ab_280c40c6f9884c7da22f6b52d45dc968.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/13864006046.pdfIn PDF document text
    • http://lelirovosas.epizy.com/busegivarefini.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/happy_marriage_anniversary_songs_free.pdfIn PDF document text
    • https://944bcc21-9f45-42c2-9889-8cf837fa5d1c.filesusr.com/ugd/50f869_58fe669a2b504cff8ea23a132430bc15.pdf?index=trueIn PDF document text
    • https://4454cc88-256b-48ad-9013-c0414c72072d.filesusr.com/ugd/67e251_c68eae73e6a94c5faf68f5b77b50d2da.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/96524636553.pdfIn PDF document text
    • https://38f9ccf9-db33-4582-994d-0ea518e52d38.filesusr.com/ugd/368de4_345f8777508f4da382c8274f7406695a.pdf?index=trueIn PDF document text
    • http://mukoluduxoge.rf.gd/satufatasevi.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/79041559514.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/crown_him_majesty_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/banshee_season_3_utorrent.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/76198832459.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_off0000d31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31F 5284 bytes
SHA-256: c9fbb34fd4b9e9da716452cac6b220fb0654d43b7d9a75b749fe8622711c4e87
font_01_sfnt_off0000e51d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51D 10416 bytes
SHA-256: e3d72cae96175abc4866a08748779787d6b1e4c9659ab34db9f415356e2c319b

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