Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2c8807a5282c5d2…

MALICIOUS

PDF

77.5 KB Created: 2021-03-31 13:38:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 611c3195f742629220b253f321d0428e SHA-1: 44cb9139b2e5658aeec9850d014b4522bfcc766e SHA-256: b2c8807a5282c5d2301ebe264098dc5e1903af74eadda934daf98abf9b3d4aa3
96 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document body, though heavily obfuscated, contains text related to 'Clover hill high school virginia', likely a lure to direct users to malicious URLs. The embedded URLs, such as 'https://baarspo.ru/wix?keyword=clover+hill+high+school+virginia', are indicative of phishing or malware distribution attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/wix?keyword=clover+hill+high+school+virginia PDF link annotation
    • http://hisgohar.site/77104898031uaxl9.pdfIn PDF document text
    • http://roserubusigiwij.mywebcommunity.org/buteogallus_meridionalis.pdfIn PDF document text
    • http://xariketixagat.mypressonline.com/bid_management_process.pdfIn PDF document text
    • http://eurosett.net/915296225376gjgs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464534/normal_5fcc623b62e31.pdfIn PDF document text
    • http://shop-kid-toys.online/principles_of_microeconomics_notesok78z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403421/normal_5fca33efa359b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475985/normal_5fe4001bdcde3.pdfIn PDF document text
    • http://wimebenese.getenjoyment.net/3074724795.pdfIn PDF document text
    • http://italia-doc.space/50949837331xcij3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469633/normal_5ff90123f0815.pdfIn PDF document text
    • http://rudovatimokasum.medianewsonline.com/colestasis_en_el_embarazo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414679/normal_603628d0b47f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392453/normal_6056635dd0a11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388818/normal_60239fe2ba01e.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://jabodegodonirad.atwebpages.com/doteloka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb4def01-2fe7-4d4d-806d-4c23cb3bf782/8311526371.pdfIn PDF document text
    • http://bowegasobufur.myartsonline.com/3889891598.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8c38d3d-f897-4c6f-b029-3054c9600a4d/probability_concepts_in_engineering_2nd_edition_ebook.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DC 4852 bytes
SHA-256: 85411048663808a8d141e3c02297c3e44ea7d910ad4901f59726e5ea63615c25
font_01_sfnt_off0000f450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF450 10860 bytes
SHA-256: 37d07c57304d7978590e9136554f73028dc9c1f5d539e821672b3655d2c6b880
font_02_sfnt_off00011936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11936 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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