Malicious PDF — malware analysis report

Static analysis result for SHA-256 236f3d016372c9f9…

MALICIOUS

PDF

77.2 KB Created: 2021-02-22 16:40:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2219f0b6bf23fbe900d7f8032aef1434 SHA-1: d91c04db292081bbd55465b455ddc61c7569d879 SHA-256: 236f3d016372c9f91263d3e31af53214d688a8b14f008ba5e41b40c74c070f80
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 0.9998

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 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://druttle.ru/wix?keyword=bulova+watch+band+clasp PDF link annotation
    • https://cdn.sqhk.co/xutazazo/gumwvku/payback_2_the_battle_sandbox_download.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/gcnhigv/magazine_luiza_canaltechbr.pdfIn PDF document text
    • https://cdn.sqhk.co/jebavimot/jageHw2/foco_video_music_video_editor.pdfIn PDF document text
    • https://cdn.sqhk.co/xivovido/hHVZe7z/zosevofagonedixodamidu.pdfIn PDF document text
    • https://gurugurib.weebly.com/uploads/1/3/1/3/131384113/kusatimotifaz.pdfIn PDF document text
    • https://cdn.sqhk.co/guzowozuk/iohdidP/20448035805.pdfIn PDF document text
    • https://cdn.sqhk.co/sovanoniwuva/jhZjegf/final_fantasy_xiv_races_au_ra.pdfIn PDF document text
    • https://cdn.sqhk.co/fodibaniwe/4qPXfhb/trial_xtreme_4_cheats_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/nulusezitelo/hfibif9/bafememepofibopumizupa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gatazeromij/rerafaxod.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/rigumexanemamotaku.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/headed_paper_word_template.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/57461948190.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/verithanam_song_sharechat.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/usher_abc_song.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e10f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10F 5120 bytes
SHA-256: 0d460770521d911479f43ae3fa81d67fb1117609c55d100a2cb3f473b78a7db8
font_01_sfnt_off0000f27b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27B 11772 bytes
SHA-256: e8669e4a0e9822f6328952250a696bf0abd72278d8d1827e575ca9dbee798a35
font_02_sfnt_off000119e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E7 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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