Malicious PDF — malware analysis report

Static analysis result for SHA-256 334ea71ff041b56f…

MALICIOUS

PDF

86.2 KB Created: 2021-03-23 00:28:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: adef1633f95981ead725b276635bf1a7 SHA-1: 7acb156db9793bd200525c1f2e1e0dc752f39de2 SHA-256: 334ea71ff041b56fb54b1ce203c4c334e258c5edc6298d0735f3c697872898e2
134 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a notable one pointing to 'maypoin.ru', which is flagged as a link farm on disposable hosting. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=quran+pak+with+urdu+translation+shia+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4447877/normal_5ff26ee41de64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371272/normal_602b26329da81.pdfIn PDF document text
    • http://rudikonutabo.22web.org/la_dama_de_las_camelias_alejandro_dumas_hijo.pdfIn PDF document text
    • http://sesulede.iblogger.org/ariens_st824le_parts_diagram.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451230/normal_5fcf0746666f5.pdfIn PDF document text
    • http://pusulij.22web.org/hoover_vacuum_cleaner_not_working.pdfIn PDF document text
    • http://makipoduzoru.22web.org/greenlee_dm_20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451756/normal_60308e990c034.pdfIn PDF document text
    • http://nuzidixiwetor.22web.org/webosazuzinememekofaxajok.pdfIn PDF document text
    • http://fufirajonitav.22web.org/rixukaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7856fd0f-d9e7-43b6-9d1a-4a3477930e0c/hp_ultraslim_docking_station_dual_monitor_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f1236ae-44fd-4917-ab4a-bf0d0e7e7a29/rodanukipolobimutevex.pdfIn PDF document text
    • http://zuzariliwit.rf.gd/grade_5_spell_bee_words.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85d11bc6-db2e-4017-9c56-73a8522d984e/nasb_bible_app_ios.pdfIn PDF document text
    • http://lutukoxu.rf.gd/18436510672.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbdac450-1ddc-4823-a08b-2d9255f71d08/zoxiletagemolimirenoke.pdfIn PDF document text
    • http://gejevebo.epizy.com/12623912005.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/069dcc86-9d32-466c-ad7f-9fc22b1945c9/86922455933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc3bf49a-36ee-4d36-943a-f3ec71ebfc18/zurisonabubediwibagur.pdfIn PDF document text
    • http://bulijisir.rf.gd/abandono_escolar_no_brasil.pdfIn PDF document text
    • http://rovatidakenaj.rf.gd/history_alive_textbook_6th_grade.pdfIn PDF document text
    • http://runonadopufeta.epizy.com/how_to_read_candlestick_graph_crypto.pdfIn PDF document text
    • http://jabekufiji.epizy.com/raladofopir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4462665-8809-4ff4-b9db-b43ec6d452f7/13425484776.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000126b6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x126B6 21008 bytes
SHA-256: da3871cae57b719e137fc70d0318df091c60f80228d10bcb3b61ef3dfa22ec1d
font_00_sfnt_off0000eedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDD 5348 bytes
SHA-256: 3e43913e924bc80d72c74e519c48c2eb9e9ada1e5687be8da150a92920b6e4f3
font_01_sfnt_off00010118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10118 10952 bytes
SHA-256: 3e2be58c1a6fd9935e1bb6d0bc7975565bd2b7ba572e7a176bc1bd46817bc611