Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef0b332a9c2a1e74…

MALICIOUS

PDF

82.5 KB Created: 2021-03-08 01:12:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b35180243f2f9aab45d0af90cd5cf26c SHA-1: e6a96aa730e4f04c203b367221c4e4862915f9d2 SHA-256: ef0b332a9c2a1e74c9b65f9a48dcaeaf92dada2d69cfce349f312ef8cc77600e
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of numerous external links, including the primary malicious URL 'https://botokaw.ru/wix?keyword=nba+live+mobile+apk+hack+offline', suggests it's part of a link farm designed to distribute malware or facilitate phishing. The ClamAV detection further confirms its malicious nature, classifying it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/wix?keyword=nba+live+mobile+apk+hack+offline
    • https://cdn-cms.f-static.net/uploads/4450347/normal_603128b4c7317.pdf
    • http://pegujanixur.22web.org/63657912839.pdf
    • http://my-favshopd.online/the_ghost_in_the_machine_meaning8glmn.pdf
    • http://pemufosapakem.mypressonline.com/stories_to_read_to_baby_bump.pdf
    • https://static.s123-cdn-static.com/uploads/4413563/normal_5ffb5aed93617.pdf
    • http://regsen.website/rebellabs_regex_cheat_sheetji90l.pdf
    • http://jebuzakawug.iblogger.org/niterigukeroni.pdf
    • http://zememor.sportsontheweb.net/fall_of_the_house_of_usher_summary_video.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c4ab9085-2b58-4403-b8a0-4ec9c5647fa3/36847679470.pdf
    • https://uploads.strikinglycdn.com/files/73d250de-3970-41dd-959f-a70e18455828/ps4_eject_button_jammed.pdf
    • http://dorofudi.epizy.com/python_machine_learning_library_scikit.pdf
    • https://uploads.strikinglycdn.com/files/5a798b28-d299-4009-92ea-f1f4a8b34ace/fusoxusujijawof.pdf
    • http://donijexufenu.onlinewebshop.net/jowutazuvunobegitigusipos.pdf
    • https://uploads.strikinglycdn.com/files/1215dd6a-06fb-4d4d-bc05-505988fe2c47/37393086673.pdf
    • https://uploads.strikinglycdn.com/files/23499846-1719-4766-a4f7-4aba74683eeb/30490185174.pdf
    • https://da54c32a-99c7-4590-8520-800dd2d1cae3.filesusr.com/ugd/7973d2_614bfb353b154d91805579723dcd280e.pdf?index=true
    • https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_f1137ac7bcc0470eb58802528a0b44e8.pdf?index=true
    • https://0306adf0-382e-42f1-903d-71c3961c97f1.filesusr.com/ugd/7ff653_d67ade371d794317b96c50232fb51e83.pdf?index=true
    • https://ab60d57a-1f92-408f-9079-0b325776b613.filesusr.com/ugd/724fb5_34f24497c233453baf470fa4fb79fe42.pdf?index=true
    • 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_off000106a8.bin
da4a28bd8c2bfebed0ed7c632b2e9b18251a5bd42c7d6ff6d24d130f1ed3ab26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106A8 5216 bytes
font_01_sfnt_off00011853.bin
f6eb761c110232a9b80e66176707d0de1463bf5e96261a2262d76f3f9f7f1855		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11853 10636 bytes

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