Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9f2f0c0361de482…

MALICIOUS

PDF

79.5 KB Created: 2021-02-22 20:47:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 698c416a55c28b87755124c5e23ce373 SHA-1: e35aac2966dc84a8eb0911f74e4fc7ff44ac5c6e SHA-256: f9f2f0c0361de482af6aee6fda3c5c691642e1ba4d8656a9e23b08a4b374bb6a
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely to facilitate a phishing attack. The document body, though heavily obfuscated, suggests a lure related to legal agreements.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/wix?keyword=sample+agreement+between+two+or+more+parties PDF link annotation
    • http://hurricane1.space/kegivudonunixvn64p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423430/normal_5fd1e04121526.pdfIn PDF document text
    • http://allfreebets.ru/learn_thai_podcast_freencdmm.pdfIn PDF document text
    • http://shoop-fr.ru/zuwigatofesutagi7oy8m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470380/normal_6000cb1369512.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393483/normal_5fcd4613ef9eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450158/normal_5fd3b90a3d762.pdfIn PDF document text
    • http://myimperfectmomlife.com/marketing_planner_template_exceld172l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422148/normal_5ff5555096b22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421472/normal_6031865b7d8e6.pdfIn PDF document text
    • http://slimerecipe.org/data_post_mortem_adalahn40z7.pdfIn PDF document text
    • http://lnstagramcopyrightcenter.com/is_the_girl_with_the_dragon_tattoo_on_netflix_uke5k2w.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481403/normal_5ff8c41b3ccac.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/rakabexozu/75867852737.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/are_graphic_design_jobs_in_demand.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/beamng_drive_variety_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/easy_piano_songs_popular_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/lofolug.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/wukowobenixirexasoxemu.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/lelelisilusodok.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/lagu_sara_bareilles_i_choose_you.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_off0000fa5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5F 5472 bytes
SHA-256: 72f9e4427196aca0aa477a02ef73c085be264693c2907058a9215e211dc36726
font_01_sfnt_off00010cef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEF 10336 bytes
SHA-256: 16039eae98abb00db0e255f8180c0bba4a07d0b108e25de944e34d786ba4f59c

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