Malicious PDF — malware analysis report

Static analysis result for SHA-256 c641e26dfaab88ca…

MALICIOUS

PDF

75.6 KB Created: 2021-03-03 02:59:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: aa78a6a8ae4584ba9376bb8ac494576d SHA-1: 37412b7226c687cde685536cd5278537ebf21e5d SHA-256: c641e26dfaab88ca2739b0fc7f37a9b5f50f7dd46fdb3f6fb0196bbac72354be
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URI that points to a suspicious domain, vilenefex.ru. ClamAV and an ML classifier flagged this file as malicious, specifically as a phishing trojan. The document body is heavily obfuscated, but the presence of external URIs and the high confidence scores from security tools indicate a malicious intent, likely to redirect the user to a phishing site or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/strik?utm_term=what+is+canine+dysfunctional+behavior PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485448/normal_6036d8e3c0003.pdfIn PDF document text
    • http://stavki-na-sport.site/88436066612sgpf7.pdfIn PDF document text
    • http://visionnew.xyz/depuketurumanatozrj8my.pdfIn PDF document text
    • http://metoxegid.mygamesonline.org/lapuwobawatumenigukinup.pdfIn PDF document text
    • http://nigma24invest.online/iata_dangerous_goods_regulations_2019y2xp4.pdfIn PDF document text
    • http://jawixogu.mygamesonline.org/how_to_reset_oil_2011_jeep_grand_cherokee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451352/normal_5feb2d1d0eb16.pdfIn PDF document text
    • http://minesaxofunawi.getenjoyment.net/7911207917.pdfIn PDF document text
    • http://xupokaxe.medianewsonline.com/tapibipafumumavokuxekevo.pdfIn PDF document text
    • http://prolac.ru/didobenutagunovalajetatujkw3m6.pdfIn PDF document text
    • http://nebofimanigi.sportsontheweb.net/tomizivur.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/pazatuv/publication_design_book.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/mewoketatexigebemojewef.pdfIn PDF document text
    • https://s3.amazonaws.com/dagasopones/health_canada_vigilance_adverse_reaction_reporting_form.pdfIn PDF document text
    • http://tovezujatim.rf.gd/cloud_storage_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/53097356899.pdfIn PDF document text
    • http://somuwoxil.epizy.com/well_always_have_summer_page_count.pdfIn PDF document text
    • http://wenares.myartsonline.com/the_land_of_stories_books_order.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/73998658304.pdfIn PDF document text
    • http://nakeviw.myartsonline.com/worijatokirebadak.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA90 5424 bytes
SHA-256: ba8e44e9d3ef3f1b3fcc8385957a5f1c159a94e626ccdcd33df6dd0ded0caf79
font_01_sfnt_off0000fd15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD15 10636 bytes
SHA-256: 9f2dc8b110227bb15093f166897bf7d7d774911bb879e525260c47787d575a88

Open this report in the interactive analyzer, or submit your own file for analysis.