Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa5d518ec6dc4093…

MALICIOUS

PDF

79.8 KB Created: 2021-09-17 03:38:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 57d31cccc44021d310d3969f83f84af0 SHA-1: 63ac6b0df85f1780ceb015325c906870f1803aa8 SHA-256: fa5d518ec6dc409394ad086d696766e8a704be155ace650ed6bd71966f00ae5a
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple external URIs, indicating it is designed to redirect users to malicious websites. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests the document's content is a pretext for financial fraud. The embedded JavaScript likely facilitates the redirection or exploitation process, contributing to the overall malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://philabc.ru/uplcv?utm_term=how+to+transfer+contacts+android+to+ios PDF link annotation
    • http://retrofotr.cz/files/file/kidugozitupawafuzo.pdfIn PDF document text
    • https://www.channeloflove.com/ckfinder/userfiles/files/kamugenunimebalavunuke.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16130e846601d6---69355412197.pdfIn PDF document text
    • https://santa.sg/images/users/00000000/files/gikagi.pdfIn PDF document text
    • https://gemicilojistik.com/userfiles/upload/file/10410540879.pdfIn PDF document text
    • https://asfus.net/virgsurv/userfiles/file/1497958258.pdfIn PDF document text
    • https://zhongzing.com/uploads/files/202109161017017448.pdfIn PDF document text
    • https://hunglivet.com/uploads/files/202109091534053228.pdfIn PDF document text
    • http://sz-nuoyi.com/Upload/file/2021091407083284371.pdfIn PDF document text
    • http://www.ernakulamarchdiocese.org/www/js/ckfinder/userfiles/files/giniguzevataf.pdfIn PDF document text
    • http://squarcialupirelaxinchianti.com/writable/public/userfiles/file/wavopabajexunusuzalinof.pdfIn PDF document text
    • http://xn--82ca1bkibi6eufn5bh1b7i3e.com/UserFiles/File/lagemenikivovuwugusozigi.pdfIn PDF document text
    • http://1mosref.ru/ckfinder/userfiles/files/fotekusegebe.pdfIn PDF document text
    • http://eternalcycle.com/FCKFiles/file/11277210482.pdfIn PDF document text
    • https://tutorlookup.com/ckeditor/ckfinder/userfiles/files/watesatamugalefabat.pdfIn PDF document text
    • https://sofahatinh.com/upload/files/vujexi.pdfIn PDF document text
    • https://smsenerji.com/resimler/files/99524508505.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/bunikenabulezawu.pdfIn PDF document text
    • http://sage-chem.com/image/files/20210909_032434.pdfIn PDF document text
    • http://mrs-edu.com/sribati/editor/uploadfiles/53089814672.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/3cf9b1d4e1b14444d9b076a81827c6f2/vifogivomotosorilejusad.pdfIn PDF document text
    • https://makojudo.pl/zdjecia/fck/file/19465368824.pdfIn PDF document text
    • http://tuzoltosagmihald.hu/userfiles/file/rulufuvopanewepanibo.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D7 10500 bytes
SHA-256: 0c15ad24d1e02724f6654c16e8b0dd202191de0161128dc892123b961e43abca
font_01_sfnt_off0000ecdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDF 17324 bytes
SHA-256: 2f27544456b676e0038200c72720c8008bc073936bb732a8d04da42728c4e2d3
font_02_sfnt_off00011974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11974 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1