Malicious PDF — malware analysis report

Static analysis result for SHA-256 718077c7d44a35bb…

MALICIOUS

PDF

68.7 KB Created: 2021-02-22 20:45:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 165574bde41ca637f49f9fc5227604d9 SHA-1: 8e88c283671fef08d38a64c96bce27bfbe594be0 SHA-256: 718077c7d44a35bb1ee21d0d030df373c14be6df73ae8933f4d2fa5419a0834d
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farm characteristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/123?utm_term=sportspower+saucer+swing+instructions PDF link annotation
    • http://menbp.online/journal_of_immunology_brief_reportsg3an.pdfIn PDF document text
    • http://naturfresh.space/eve_online_gas_miningmtadp.pdfIn PDF document text
    • http://vizit.store/lagugaruvuvokenudevurlnz5o.pdfIn PDF document text
    • http://securespot.ru/tevatuxigetimubuvax1ok0q.pdfIn PDF document text
    • http://1cats.space/54018280163w3ncj.pdfIn PDF document text
    • https://cdn.sqhk.co/pezolaje/4jcggjc/cake_decorated_with_macarons_and_meringues.pdfIn PDF document text
    • https://cdn.sqhk.co/pozuwifofub/sq7GHia/idle_makeover_mod_apk.pdfIn PDF document text
    • http://buyfastedcircle.xyz/11885413400ddfwu.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/jhgigiJ/42845109682.pdfIn PDF document text
    • http://prodson.space/life_smart_infrared_heater_partspuk4v.pdfIn PDF document text
    • http://gsmall.space/9429114360aj0va.pdfIn PDF document text
    • http://taher-tcac.com/is_hp_ink_worth_ito91ml.pdfIn PDF document text
    • http://filmera.ru/858309351947qmz8.pdfIn PDF document text
    • https://cdn.sqhk.co/midijanere/BgiHyIY/sumolamanatogi.pdfIn PDF document text
    • http://myluckybet.xyz/organic_chemistry_questions_answerslear7.pdfIn PDF document text
    • https://cdn.sqhk.co/litalile/Npoicid/71842914112.pdfIn PDF document text
    • http://healsmall.space/sa_trending_videos_downloadhbu18.pdfIn PDF document text
    • https://cdn.sqhk.co/saturarad/qLkjahc/legendary_raid_boss_after_giratina.pdfIn PDF document text
    • http://obmenkalnr.online/9040818870639tp4.pdfIn PDF document text
    • https://cdn.sqhk.co/wujugojuse/rpjj0hf/crossy_road_unlimited_coins_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zibavuna/dwDjh3Z/tupedenalorepore.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/fofeguj/ipad_pathfinder_character_sheet_app.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/band_baaja_baaraat_songs_songspk.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/the_freedmen_s_bureau_bill_worksheet_answers.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_off0000cf10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF10 5264 bytes
SHA-256: d5ae6230b6ab0f52b954c778526d1677b0444de3009542328556c48d64325905
font_01_sfnt_off0000e115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE115 10112 bytes
SHA-256: a4f68683667323372ddeeb2a12887c3d27e0c0e3bc24ef3a70d276816b6c6b83

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