Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a1480228a565cf3…

MALICIOUS

PDF

81.1 KB Created: 2021-10-07 01:14:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: bc7025e1291a6546bda0ed708ac6f658 SHA-1: 045fe1dfe9b368fe694b1256edd7a0ce88eb0470 SHA-256: 3a1480228a565cf369ad665c4ea0798657e6eda63292fe13bab6e043b9c56887
156 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which point to compromised or disposable hosting domains, indicating a link farm designed to distribute malicious content or phish users. ClamAV and ML classifiers strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • 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://godahoian.com/app/webroot/upload/files/52563383679.pdf In PDF document text
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/38822438869.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/67720513844.pdfIn PDF document text
    • https://goooinggroup.com/userfiles/files/20210906_011150.pdfIn PDF document text
    • https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16156ead9e231c---63139262001.pdfIn PDF document text
    • http://www.offshoreyachts.net/web_upload/editor/files/pukumuz.pdfIn PDF document text
    • http://ksiclubbiz.ksiclub.org/svnprojects/DHD/Source/images/files/zozonasajudamitaminunesin.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/5b8984fd52ca041bd3a7090a0d9f66b0/17154032521.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/96603066261.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1615880dcd89ce---regogazunefiride.pdfIn PDF document text
    • http://abwessex.com/uploads/files/ralulu.pdfIn PDF document text
    • https://elesud.it/img_pagine/file/72903372710.pdfIn PDF document text
    • http://studioguidobarbieri.it/userfiles/files/sirabetimepapateju.pdfIn PDF document text
    • http://gymostrov.eu/gymostrov/userfiles/file/66762604695.pdfIn PDF document text
    • http://onthebroadway.com/CPD/adminpanel/upload/file/25917811800.pdfIn PDF document text
    • https://crownprolaw.cn/userfiles/Proj_Name/files/bovewukipegosazitevigini.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133563c49939---56237374362.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/bamoj.pdfIn PDF document text
    • https://dunakanyarfesto.hu/ckfinder/userfiles/files/vokozekesi.pdfIn PDF document text
    • http://keystoparadise.com/userfiles/files/dogepuwozobupoxefamin.pdfIn PDF document text
    • http://lifeisartfoundation.org/sites/default/files/images/userfiles/file/35327948855.pdfIn PDF document text
    • http://sanyosushiglendora.com/uploads/files/83100505149.pdfIn PDF document text
    • http://vonschickenconcord.com/uploads/files/xakojepizewiwixubexas.pdfIn PDF document text
    • http://barexkft.hu/userfiles/file/77879831512.pdfIn PDF document text
    • http://taiwan-casters.com/userfiles/file/64093210949.pdfIn PDF document text
    • http://sapientgenerator.ru/files/userfiles/files/55117841215.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=55+divided+by+3PDF link annotation
    • 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_off0000d7a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBB 18788 bytes
SHA-256: beefe90d79a396c5aaa07cb9ceec03137b2feb4a6cf2c94510e0c53b01e78ba2
font_02_sfnt_off000120c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C7 9972 bytes
SHA-256: 1695d153cee8a36d35478e0388743ed5c835e47521b946dde27c68d40f140cef