Malicious PDF — malware analysis report

Static analysis result for SHA-256 0324e808b343ca6e…

MALICIOUS

PDF

75.8 KB Created: 2021-02-21 22:54:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e46924fd2c2eb0eafd8f16d08032e9e2 SHA-1: 2fcd12297e031bc18e130f660327a5fc52383df3 SHA-256: 0324e808b343ca6e044f09de31028fbef693567900741fb8ff067e575e0a3f21
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are hosted on free dynamic DNS services, suggesting a link farm or phishing attempt. The primary URL, 'https://crophysi.ru/strik?utm_term=what+is+organic+chemistry+in+urdu', is presented as a search result, likely to deceive users into clicking. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://crophysi.ru/strik?utm_term=what+is+organic+chemistry+in+urdu PDF link annotation
    • http://zoosalon.org/24856743391jrpgn.pdfIn PDF document text
    • https://jurivulanikep.weebly.com/uploads/1/3/4/5/134525456/8080638.pdfIn PDF document text
    • https://lurakowufo.weebly.com/uploads/1/3/4/4/134457973/pepokerufujali_panirifip_poresil.pdfIn PDF document text
    • https://ratopavitakam.weebly.com/uploads/1/3/4/4/134460251/wazux-dumokifeweb-jakeni.pdfIn PDF document text
    • https://metasabuvaro.weebly.com/uploads/1/3/2/6/132681671/zetelage.pdfIn PDF document text
    • http://arthromedro.xyz/nexudasexeeh4.pdfIn PDF document text
    • http://crystal-light33.ru/fovujoxepifebagiji21f2.pdfIn PDF document text
    • http://sijazoge.iblogger.org/assets_and_liabilities_management_project_report.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://susebuxusebug.epizy.com/58786917063.pdfIn PDF document text
    • http://pepukogabam.rf.gd/gta_5_dlc_cars_xbox_360.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/82701615734.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/battery_saver_apk_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/california_car_bill_of_sale_form_free.pdfIn PDF document text
    • http://bigofuzov.epizy.com/ill_be_gone_in_the_dark_trailer_karen_kilgariff.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/45553829223.pdfIn PDF document text
    • https://s3.amazonaws.com/girilifawuxi/attendance_android_app_github.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
    • 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_off0000d10b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD10B 5436 bytes
SHA-256: ce8e85c0b0eff768c9b7fdc15cfe39f55b972d40ef546ed89fc770a5e29a205a
font_01_sfnt_off0000e36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36F 10192 bytes
SHA-256: e80648b20f5fb5e69690d90f2bece7e515dc6558b7a9df4e87345d1abfa46cb6
font_02_sfnt_off0001065b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065B 17384 bytes
SHA-256: dc74cfa15e6e9ec42d1e4aa697080eda78c09f2a8149cfefbc73dd696da59611

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