Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1fed1ac81172ccb…

MALICIOUS

PDF

98.3 KB Created: 2021-03-02 00:00:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3fc1caf80688fd56335eb5c29753bbd SHA-1: 7657ebba450fd991aeeb9164608d46b26a1b9d9b SHA-256: b1fed1ac81172ccbaf520fbd31871f446ed75fa945c96f79066aea0a6991431f
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that promises a Nintendo eShop code generator, a common lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the presence of an external URI and the nature of the lure suggest it's designed to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/wix?keyword=nintendo+eshop+code+generator+online+no+survey
    • https://mafupixalikufu.weebly.com/uploads/1/3/4/6/134662523/dotor_rofavizova_ruxewidiv.pdf
    • http://tixokapine.mypressonline.com/internal_error_2761.pdf
    • https://cdn.sqhk.co/bilanogakiw/jhhHhgu/wavunerukogiwir.pdf
    • https://gazafakapudon.weebly.com/uploads/1/3/4/3/134345815/leraxixu.pdf
    • http://business-open.online/how_to_write_a_descriptive_paragraph_about_an_eventkt1fh.pdf
    • http://vizojuzoninunoz.scienceontheweb.net/xitisujoruxanadatijasi.pdf
    • http://kinoogf.space/98777565985f5ubv.pdf
    • https://cdn.sqhk.co/letonolomo/gShbjht/fashion_city_2_sacramento.pdf
    • http://simultaneously.space/abdomen_agudo_inflamatorio_2017dh2it.pdf
    • http://testersairf.xyz/wuvubikejevilokemupevxhw6.pdf
    • https://rutemaja.weebly.com/uploads/1/3/1/4/131438840/bulojovegiw_sewepipanixag_deliguji.pdf
    • https://cdn.sqhk.co/piwixesiwufo/ggjehaC/block_puzzle_fantasy_paypal.pdf
    • https://fosuwelu.weebly.com/uploads/1/3/2/6/132695698/jilimejito.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wovisak/project_critical_path_template.pdf
    • http://sabixukavizom.myartsonline.com/speakeasy_bar_and_grill_bar_rescue.pdf
    • https://s3.amazonaws.com/wunojipu/wallpaper_photo_editor_free.pdf
    • https://s3.amazonaws.com/bagokiko/characteristics_of_j._alfred_prufrock.pdf
    • https://s3.amazonaws.com/suzujewa/all_books_and_authors_2018.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_off00014223.bin
03f56967b48588355e8ab6f8e731ca4eb1b5d3898e9a42f345378cfac6ce4a27
pdf-font-stream PDF embedded font (sfnt) at offset 0x14223 5464 bytes
font_01_sfnt_off000154c6.bin
8d512095dd1c13917f8517eeabb18c09a952ebfe2d88ec2e2b3a4d724b2c463a
pdf-font-stream PDF embedded font (sfnt) at offset 0x154C6 11396 bytes