Malicious PDF — malware analysis report

Static analysis result for SHA-256 86452f435581bed1…

MALICIOUS

PDF

85.7 KB Created: 2021-03-18 22:34:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d145a30550ed5d3e8377195054c70e2c SHA-1: d5cea65b05936f6b13f41df4e6576d692c90830e SHA-256: 86452f435581bed12a3f8e639a9e01c658a527d4c1a747a6b4949abf70c3b51e
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that leads to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of an external URI points to a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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://ponafet.ru/123?utm_term=chopin+grande+polonaise+sheet+music
    • https://cdn.sqhk.co/totafeta/ijGijkV/video_call_using_android_tv.pdf
    • https://cdn-cms.f-static.net/uploads/4408871/normal_604a4f6dc295f.pdf
    • http://marketeuro.pro/158889075344y837.pdf
    • http://ersoil.fun/the_bear_faulkner_wikipedian55pf.pdf
    • https://cdn-cms.f-static.net/uploads/4453532/normal_5fd7113d403dd.pdf
    • https://static.s123-cdn-static.com/uploads/4368471/normal_5ffb35cfed990.pdf
    • http://voiprormul.xyz/balekawuvibeddvup.pdf
    • https://cdn-cms.f-static.net/uploads/4451363/normal_5fdad52e5c076.pdf
    • https://cdn.sqhk.co/xagaxubibiz/8ibje9t/hybrid_commuter_bikes_for_sale.pdf
    • http://grenkasalo4.xyz/26178198578lg1t0.pdf
    • https://cdn-cms.f-static.net/uploads/4470839/normal_603ba1a71334a.pdf
    • https://cdn.sqhk.co/wevosevob/ichbYha/horse_running_on_water_tiktok.pdf
    • http://ipatovaalena.ru/aventura_la_novelita_2_lyrics6y8yu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kowewewabozete.epizy.com/bulova_marine_star_98b301_manual.pdf
    • https://uploads.strikinglycdn.com/files/096d5ecf-0696-467a-8507-ac541f491c1a/is_the_hp_stream_11_a_good_laptop.pdf
    • http://timarofata.epizy.com/sepafefexuzojejumanagirag.pdf
    • http://nowozogep.epizy.com/17615394553.pdf
    • https://uploads.strikinglycdn.com/files/69028351-ad37-483f-a40b-1366c38eb9c7/ue_megaboom_charger_nz.pdf
    • https://uploads.strikinglycdn.com/files/dcfbd0cc-94eb-4b91-908c-3e42b9db08f8/kaba_lock_customer_support.pdf
    • http://kakiborul.epizy.com/breville_bov800xl_smart_oven_1800-watt_convection.pdf
    • https://s3.amazonaws.com/gekixadonuru/carlene_davis_songs.pdf
    • https://s3.amazonaws.com/mutirexa/cd_cardstock_sleeve_template.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f81f.bin
de7b3224dfb16ee4a7aedeb978a1dacc6ea67fe86a7acc3c31e32d66741a9192		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF81F 5392 bytes
font_01_sfnt_off00010a48.bin
d4e7c1d4b8c62058c354d0300d95546225d5a96adacc3318eafb7a88475179a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A48 12188 bytes
font_02_sfnt_off000133d7.bin
4360e29b7d2504916afe74d557016965ce00ddb6e9b1d1498b998f2d7a1046f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133D7 16184 bytes

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