Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e34fa9daf5373e…

MALICIOUS

PDF

67.9 KB Created: 2021-02-24 14:38:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 1806da138af90e13e420e8164d96715f SHA-1: 96fd9ebbc04a34b24d08f542bd57654d38f260ab SHA-256: 47e34fa9daf5373eedacad0deb77fff8b5cbdf35d74ece1372bf3abac9d8199e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to potentially malicious domains, disguised with keywords like 'study guide pdf'. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs and link farm heuristics further supports a phishing or malware distribution attack pattern. No scripts were extracted, but the overall structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/wix?keyword=ignatavicius+study+guide+pdf PDF link annotation
    • https://cdn.sqhk.co/wufevinek/oxoignP/67214414028.pdfIn PDF document text
    • http://sokuzise.iblogger.org/purani_haveli_bhoot_film.pdfIn PDF document text
    • https://cdn.sqhk.co/bokupajokim/h8lnmvX/swiss_national_hockey_league_schedule.pdfIn PDF document text
    • https://cdn.sqhk.co/nujidegowupi/ja2xlxw/the_room_2019_trailer.pdfIn PDF document text
    • http://gachihyper.xyz/kofekugosimaxewc2x8.pdfIn PDF document text
    • http://ttttrrrr.space/title_page_of_a_research_reportc1522.pdfIn PDF document text
    • https://cdn.sqhk.co/sikereri/tg7bQhe/kontra_k_freunde_vollmond.pdfIn PDF document text
    • http://fruktovik.com/ellenberger_discovery_of_the_unconsciousp3iex.pdfIn PDF document text
    • http://kikudesazogug.22web.org/gameshark_codes_for_pokemon_fire_red_android.pdfIn PDF document text
    • http://lnstagram-helps-contact.com/birds_vs_zombies_2_free_download_for_pch5ftc.pdfIn PDF document text
    • http://straponartist.com/beetlejuice_the_musical_sheet_musicpiy0l.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/safago/93787175945.pdfIn PDF document text
    • http://bifezuragumizi.rf.gd/baby_formal_leather_shoe.pdfIn PDF document text
    • http://bagasukozu.rf.gd/1233556863.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/abu_garcia_max_winch_vs_black_max.pdfIn PDF document text
    • http://tokuloxigov.epizy.com/23621752103.pdfIn PDF document text
    • http://jigosip.epizy.com/57959184959.pdfIn PDF document text
    • http://nonosolagosev.epizy.com/chandi_ki_payal_video.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_off0000ccc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC1 5292 bytes
SHA-256: 0d1d6362a0fc074371420cfcf384672dea4f8fb780df35943f10ecd88deea9d1
font_01_sfnt_off0000def0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF0 10400 bytes
SHA-256: 6d96fe59fc66e2749f8737f73c290125918cdca6203b57547151176100512d86

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