Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f5350deb72eaac9…

MALICIOUS

PDF

79.8 KB Created: 2021-05-18 19:48:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 063b167e58f4ba0cf82af297e4e1c4ed SHA-1: 0f27182ac6a0efea2bebfd6656d70b4459d0c359 SHA-256: 4f5350deb72eaac93a9edbe5947823b285e9c6bd8edc40f023b25b8d6227e623
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. ClamAV and ML classifiers strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains text fragments suggesting a lure related to a fast-food promotion, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/strik?utm_term=is+sonic+doing+half+price+shakes+after+eight
    • https://cdn-cms.f-static.net/uploads/4484812/normal_60652919ac676.pdf
    • https://cdn-cms.f-static.net/uploads/4385648/normal_606915ff9b412.pdf
    • https://cdn-cms.f-static.net/uploads/4415740/normal_5fe6cdd3dd414.pdf
    • https://cdn-cms.f-static.net/uploads/4490974/normal_6051ccf3ef677.pdf
    • http://moxufelomewiziw.iblogger.org/webotojerugibanotesezodi.pdf
    • https://cdn-cms.f-static.net/uploads/4365608/normal_601eb91de2a48.pdf
    • http://siloxolilalapas.22web.org/data_science_and_big_data_analytics_download.pdf
    • http://xajoraxi.22web.org/automate_the_boring_stuff_with_python_github.pdf
    • https://cdn-cms.f-static.net/uploads/4394062/normal_6043b9b6d7ac9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vipuxafol/asymptotes_of_functions.pdf
    • http://feselipalez.epizy.com/33785108130.pdf
    • https://s3.amazonaws.com/fifomi/frigidaire_refrigerator_parts_list.pdf
    • http://segidamilezuv.epizy.com/scroll_to_element_in_appium_android.pdf
    • https://s3.amazonaws.com/makumapikeze/26856511.pdf
    • http://koxowasone.epizy.com/android_google_drive_backup_photos.pdf
    • https://s3.amazonaws.com/fidefofudi/17495422803.pdf
    • https://s3.amazonaws.com/fadadedezeker/guardian_university_guide_2019_history_of_art.pdf
    • https://s3.amazonaws.com/bokelur/wivumin.pdf
    • http://surobufalinaxis.epizy.com/23254790852.pdf
    • https://s3.amazonaws.com/sixenogafopoj/allah_hu_akbar_image.pdf
    • https://s3.amazonaws.com/bokelur/17832435389.pdf
    • https://s3.amazonaws.com/jeduzizonox/nefudolapekakuxibanixo.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6c9.bin
1912a6122c12875fd7eea4e67642888efa4d0b4a6ab97d2f4817a939ef5fa441
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C9 5416 bytes
font_01_sfnt_off00010937.bin
498b3480e317b2d55295fb05ced71d92b2a059efcf69b9893d74cdb25514ada4
pdf-font-stream PDF embedded font (sfnt) at offset 0x10937 11964 bytes