Malicious PDF — malware analysis report

Static analysis result for SHA-256 30e024063460aade…

MALICIOUS

PDF

70.7 KB Created: 2021-09-09 23:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ce0f63b1bd3972b390e33f4f713fda70 SHA-1: cf3c85a3c8e636d560a4804cf1631fe7c64f777d SHA-256: 30e024063460aade4499beb5832226e1c981c0a266a7dc7214d477c586f7d8da
142 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, indicating it is designed to redirect users to potentially malicious websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a phishing or malware distribution scheme. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4886

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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
  • 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://hatinhjobs.com/upload/files/42769580935.pdf In PDF document text
    • http://hantechwelding.com/userfiles/file/2021090700264773499.pdfIn PDF document text
    • https://www.willmarshelter.com/ckfinder/userfiles/files/95777224984.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/41363716087.pdfIn PDF document text
    • https://asztromiskolc.hu/ckfinder/userfiles/files/98048764818.pdfIn PDF document text
    • http://www.cda.org.hk/ckfinder/userfiles/files/mukamu.pdfIn PDF document text
    • http://parentini.it/userfiles/files/7501499714.pdfIn PDF document text
    • http://sumbulefendiegitimvakfi.com/resimler/files/38657673675.pdfIn PDF document text
    • http://faurau.com/luodan/images/userfiles/file/42161416521.pdfIn PDF document text
    • https://tepatsasaran.com/contents/files/11665433511.pdfIn PDF document text
    • http://k-ookuma.com/js/upload/files/gebakabik.pdfIn PDF document text
    • https://rugerwafers.com/demo/ruger/beta/userfiles/files/lorug.pdfIn PDF document text
    • http://mvdeastudio.it/userfiles/files/22312124775.pdfIn PDF document text
    • http://medizator.ru/ckfinder/userfiles/files/48971937180.pdfIn PDF document text
    • http://upsshop.ru/ckfinder/userfiles/files/bideperaxikag.pdfIn PDF document text
    • https://sanipacific.com/attachment/file/82458658485.pdfIn PDF document text
    • http://ux-school.ru/files/files/pejukawemevuwizolepapizu.pdfIn PDF document text
    • http://sjzhtchem.com/upload/files/10016588603.pdfIn PDF document text
    • http://balbu.eu/uploads/news/file/goronemesazojexogumelu.pdfIn PDF document text
    • http://qdcmd.com/data/files/85586312270.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/7f83d8f01a3cad3fc1156b613ab150d5/darubigekagufesazi.pdfIn PDF document text
    • http://domgr11.ru/uploads/files/46544580832.pdfIn macro / runtime command snippet
    • http://color-gateway.com/userfiles/file/25119874911.pdfIn PDF document text
    • http://e-kva.ru/admin/ckfinder/userfiles/files/16722063572.pdfIn PDF document text
    • https://amartzon.store/wpIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=black+cross+dj+apkPDF link annotation
    • 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_off0000bef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d70d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD70D 10356 bytes
SHA-256: 627e160cc8df1116006b004025d3f2b98fdf93ce091457bbbeb1f427db51b1a9
font_02_sfnt_off0000ee9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9D 18084 bytes
SHA-256: 9cb525b3eb31d1d21d246612f1325afd1f512db40050e6a2f315ab617956c85b

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