Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3b16dc8c7506ceb…

MALICIOUS

PDF

89.0 KB Created: 2021-03-18 19:42:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c86babff61cf5ce00e724170efbf7e6 SHA-1: 266c1d197b9e21af870482731f15404b2ec854e1 SHA-256: b3b16dc8c7506ceba1117367ec0d9e4aae01bb1e0036a3ce81563cddab2d988c
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to phish or deliver malware. The embedded URL is a primary indicator of malicious intent, likely leading to a phishing page or a further stage of infection. The ML classifier and ClamAV detection strongly support the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/123?utm_term=merge+all+excel+files+into+one+sheet
    • http://tigitaja.iblogger.org/how_to_connect_ipad_to_jawbone_jambox.pdf
    • http://copyright-help-center.com/michael_jackson_scream_jumper8slr7.pdf
    • http://ing-cliente.com/noxuzupixasakepiroxisaxwab.pdf
    • http://reduslim-shop.site/alcatel_u3_4049d_manual1ub6i.pdf
    • http://slimerecipe.org/jaira_burns_ugly_album_download_torenttkxcfb.pdf
    • http://interior.estate/vampire_diaries_season_1_episode_12_full_episodeqvylb.pdf
    • http://idealica-official-it.website/pioneer_avh-x4500bt_wiring_diagram81gh0.pdf
    • http://like-store.site/5247786178heb35.pdf
    • http://pimebujeben.66ghz.com/zimewow.pdf
    • http://ogranicbio.space/labajuritefazetodupad4z2t.pdf
    • http://lefuduzitenazig.22web.org/pit_and_the_pendulum_movie_1991.pdf
    • http://lnstagramcopyrigtservice.com/7208128952r4pwf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/db22faa7-15bf-4e9a-8bf4-c677ccb72788/52545819963.pdf
    • http://pixoralozod.epizy.com/78495771009.pdf
    • https://uploads.strikinglycdn.com/files/01c68165-cbc5-47f7-b928-ad9ed5ed955e/fuloxawodegelo.pdf
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_54fe640abdd746f4a3acd6bb6f92c4b4.pdf?index=true
    • https://f7e05ffc-afae-4d19-be15-7e9c659e5e5f.filesusr.com/ugd/72f62b_1d540b7e2ef94e4bbb9c2f6f33a5de4c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a0419908-bc52-43eb-8173-0f2409958c6b/23325585159.pdf
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_95242aa9b06b45a7aed1e7d479328d93.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4cedf6dc-f4c6-43fc-8f14-9b9c6bb6b367/nibinon.pdf
    • https://626fb5af-1d67-41cb-86ce-204163677ff0.filesusr.com/ugd/9d869b_a05d9fc6742d423181b25f1c60b00743.pdf?index=true
    • http://wolumonixor.epizy.com/best_site_for_cracked_apk_files.pdf
    • https://uploads.strikinglycdn.com/files/1fa47ffd-eb18-4b34-9435-a608a054ddf6/riders_of_the_purple_sage_1996.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_off000108e9.bin
ef4d33fdb2195384355d83bba96111be83e51a604a85c518d0603f6bc893be02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108E9 5216 bytes
font_01_sfnt_off00011aba.bin
903cbe5630f07ca9ca9907b69186be2a28089a3bb5599b66be54b10e3f8e4d4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11ABA 11192 bytes
font_02_sfnt_off000140f5.bin
1d4ebd634e9a4b1afc3ba2e660f7abdbad7ecfb3c20c2fb0daf688bec4f9a1d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x140F5 16232 bytes

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