Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ee3f2a27c4ac233…

MALICIOUS

PDF

88.8 KB Created: 2021-03-06 15:48:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3557df2927fa9017fa2d38315b29e88c SHA-1: 2300a9ab82d7e868e1c1fd892df3d11db0c13094 SHA-256: 3ee3f2a27c4ac23321cd5c5c46b91acefd979d1b53d87ff6d258b0f41d1cde27
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary URL points to a domain that appears to be part of a link farm, suggesting a malicious intent to redirect users. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs strongly indicate a phishing or malicious redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/123?utm_term=kahneman+thinking+fast+and+slow+wikipedia
    • https://cdn.sqhk.co/sowojusawepu/Ahohj1v/xowegolawawujaraxivisitax.pdf
    • https://fenatinuzari.weebly.com/uploads/1/3/5/3/135314561/kusaxobokabixilolovu.pdf
    • https://cdn.sqhk.co/mudifuto/qWibbjj/bally_space_invaders_pinball_machine.pdf
    • https://cdn.sqhk.co/jozojonujaj/ajgUZig/hard_sudoku_puzzles_with_answers_to_print.pdf
    • https://wafulezejo.weebly.com/uploads/1/3/4/7/134748518/f41c72227db6.pdf
    • https://cdn.sqhk.co/kefexunas/haFhiXX/furniture_minecraft_apk_free_download.pdf
    • http://chatik85939775.fun/fantastic_mr_fox_movie_character_analysis9uzx5.pdf
    • http://trikotoria.ru/warframe_ivara_farming_guidecxh47.pdf
    • https://cdn.sqhk.co/paxabuxutujo/heifLFH/lelopixisapab.pdf
    • https://cdn.sqhk.co/wesuwajil/hijiajb/water_slides_for_sale_houston.pdf
    • http://ejinaya.com/the_seven_sins_of_memory_by_daniel_l._schactereftvo.pdf
    • http://springtea.space/how_much_is_a_2006_honda_civic_coupe_worthu3zm3.pdf
    • https://xuwumiguxapizif.weebly.com/uploads/1/3/0/7/130739656/1002892.pdf
    • https://mefosenide.weebly.com/uploads/1/3/4/7/134715399/6584218.pdf
    • http://jabilevij.mypressonline.com/gazutowunonoba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mubefula/birthday_song_audio_english.pdf
    • https://s3.amazonaws.com/bokelur/one_bengali_movie_utorrent.pdf
    • http://nejimafalun.onlinewebshop.net/9685442494.pdf
    • http://tuwutexo.onlinewebshop.net/voperavozukewomojaxu.pdf
    • https://s3.amazonaws.com/fosalizuzu/15296394265.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000119d9.bin
4e8d8190e1bea5756fd7620f7cb10f6e061141ce6d31bf0b9176b47ee303bdad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119D9 5484 bytes
font_01_sfnt_off00012c78.bin
25448ca3bc850cc92609491ddad9bd963911d3240289dd3969ba39adea2c6f99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C78 12248 bytes

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