Malicious PDF — malware analysis report

Static analysis result for SHA-256 c350c65ccd1ab83b…

MALICIOUS

PDF

76.9 KB Created: 2021-03-09 12:31:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 29b1af5556d2730ea3261df772870c04 SHA-1: da81ca55ff057121a6e8b179ffe8574fa859ddd6 SHA-256: c350c65ccd1ab83b1574cbad4152af418f944e702b9b9ac460a4f34ce386c89a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/wix?keyword=victsing+bluetooth+mouse+manual PDF link annotation
    • http://nibajafij.medianewsonline.com/99435670552.pdfIn PDF document text
    • http://dipunag.getenjoyment.net/kuvuxezudutonomu.pdfIn PDF document text
    • http://xasedogamif.mypressonline.com/how_to_merge_files_in_foxit_phantompdf.pdfIn PDF document text
    • http://suvuxivenorum.mypressonline.com/harry_potter_books_in_spanish_free.pdfIn PDF document text
    • http://lnstagramcopyrightcenter.com/bible_coloring_book8zb5n.pdfIn PDF document text
    • http://tideparipawovu.mygamesonline.org/how_to_get_a_helicopter_in_gta_5_cheat_ps4.pdfIn PDF document text
    • http://retamos.mygamesonline.org/44711517730.pdfIn PDF document text
    • http://mjawebdesign.net/emulator_android_yg_ringan_buat_pcpbsfm.pdfIn PDF document text
    • http://grampus-shop.com/86008912880trbjy.pdfIn PDF document text
    • http://predouche.xyz/70134609894lgp1w.pdfIn PDF document text
    • http://murimubijejaba.mygamesonline.org/material_safety_data_sheet_example.pdfIn PDF document text
    • http://xamawigokoke.mygamesonline.org/is_a_declaration_of_trust_valid_after_marriage.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
    • http://zodiripek.myartsonline.com/how_to_keyword_search_on_ipad.pdfIn PDF document text
    • https://d4996ccb-aecf-47c4-aab6-3c4fe022e1b7.filesusr.com/ugd/b7ed05_acfc91fdda314182847680060529e18f.pdf?index=trueIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/bosepaxatonufowafoko.pdfIn PDF document text
    • https://a519209a-2b0a-481f-9fe9-460c873bdc80.filesusr.com/ugd/270e53_aea2309d1f1e43ea89d3ae14a0e1738f.pdf?index=trueIn PDF document text
    • https://7c5e2310-e79b-429e-9f4a-70471a43dcce.filesusr.com/ugd/8ec1ef_bd92eefd77494ff595ce44d1b4fb5f4f.pdf?index=trueIn PDF document text
    • https://d56a38bf-d62e-453c-9b5b-5b2fe88aea46.filesusr.com/ugd/359e64_8c911061f43d47b38bf71a6defbe2468.pdf?index=trueIn PDF document text
    • http://lodumojokexiku.onlinewebshop.net/38304683976.pdfIn PDF document text
    • https://1ffb5d6c-d890-49e0-9b87-dc10fbfa49e2.filesusr.com/ugd/8bc2a6_75f98bf255c741579f9e59bc92faf520.pdf?index=trueIn PDF document text
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_d8b2334fcc5948718d6bbee8ded4e3e9.pdf?index=trueIn 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_off0000e44f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44F 5104 bytes
SHA-256: f491d5d05f7ea78c3c87678e209bf6e03f0d86a3ac14f3006da13220522abadf
font_01_sfnt_off0000f57b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57B 10148 bytes
SHA-256: 9325ae1eb9ec467ccbece7626572881a482b4043926848bb020450bbb2805784
font_02_sfnt_off0001184b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1184B 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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