Malicious PDF — malware analysis report

Static analysis result for SHA-256 366418f38944186a…

MALICIOUS

PDF

92.8 KB Created: 2021-03-26 10:50:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 10fbc90efc7998032772ceb0e3700998 SHA-1: c4b6ae62a5a06f2d1056763c1d5143c43cef87c4 SHA-256: 366418f38944186a23f848f1f7a74214fa18fc546c33ad2d70dbdefc7e863853
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous external links, including a primary link to 'https://midufefew.ru/award?keyword=surah+ar+rahman+pdf+tajwid', suggesting a lure to a malicious site. The PDF also contains a mass of external links, with one pointing to 'https://s3.amazonaws.com/mijumomub/jovan.pdf', which is likely part of a link farm to improve SEO for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://midufefew.ru/award?keyword=surah+ar+rahman+pdf+tajwid PDF link annotation
    • https://cdn.sqhk.co/kuwusemob/hgjfEja/pdf_annotator_free_portable.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwozobo/6iaidih/kalamesogevu.pdfIn PDF document text
    • http://wozovumorawoka.sportsontheweb.net/pdf_bestand_kleiner_maken_zonder_kwaliteitsverlies.pdfIn PDF document text
    • https://zukigepuzena.weebly.com/uploads/1/3/4/5/134593101/joduwepapujib.pdfIn PDF document text
    • https://bejitukinerebi.weebly.com/uploads/1/3/4/8/134890105/galoli_ribepo_biwofutirugutuz.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/13053144221.pdfIn PDF document text
    • http://xogunajeraxuda.mywebcommunity.org/ikea_catalogue_request_2021.pdfIn PDF document text
    • https://cdn.sqhk.co/kewesowovim/ijGonZP/detective_story_criminal_case_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirurafixi/PifWibu/ecobank_rapid_transfer_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wowobavukelo/idKhajd/download_tic_tac_toe_glow_apk.pdfIn PDF document text
    • https://gidafefutor.weebly.com/uploads/1/3/4/0/134040883/dodozobixutifili.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/mijumomub/jovan.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/pokemon_go_xp_guide_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/nitecore_charger_d2_vs_i2.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/albatross_golf_banguide.pdfIn PDF document text
    • http://laxukumelukadut.myartsonline.com/analysis_of_variance_and_covariance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e54343d4-6b82-4a12-a919-3982efe811bb/76330426069.pdfIn PDF document text
    • http://wolobugoxew.myartsonline.com/light_novel_reader_app_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b062773e-ec98-42b6-a9de-a6340b96bb2b/gre_quantitative_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99d21275-0817-4c35-9e6d-4c4e08b77f34/samsung_tablet_ce0168_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0f6be56-c0c8-4fac-8d1b-04b96b494d32/what_is_99_year_lease.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/all_arabic_fonts_for_autocad.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/83730337380.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A41 5340 bytes
SHA-256: f11ced21ed71ce6c8d0001167774f8a246e5f688d92469eaf462a3e9e1e2ea6d
font_01_sfnt_off00011c56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C56 12144 bytes
SHA-256: fdb73f1d5c57736fd80e5461ceb115798c0e86e62c50f2ed7d4e735e1edde046
font_02_sfnt_off000143cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143CC 19980 bytes
SHA-256: 32bb3de3d84780540973edaca7e714b881b7abbdc7e19d689522b47dee39c813