Malicious PDF — malware analysis report

Static analysis result for SHA-256 0547f231e1ade422…

MALICIOUS

PDF

81.3 KB Created: 2021-09-06 23:06:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6dd307510e8742bdb7cbfac42d448fc0 SHA-1: 76f6cb75e00976a91fb11aa9f1dbd832f1438b07 SHA-256: 0547f231e1ade422cca8d071a8c6d3df3d5ddeffed21678a47efc0c173ed8133
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS upload directories. The presence of these links suggests an intent to redirect users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://yodishit.com/uploads/userfiles/file/87029091701.pdf In PDF document text
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/554349981.pdfIn PDF document text
    • http://chupanhnoithat.vn/upload/files/bonulu.pdfIn PDF document text
    • http://ridendo.cz/files/file/xidozawobejidafame.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/16793837010.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/705faa50c3810605fb864f08aaf550ff/50995521205.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/d543d6fa6a15b915cc2d05ba7a724caa/87080631900.pdfIn PDF document text
    • http://classtool.info/upload/files/pigapene.pdfIn PDF document text
    • https://steammining.com/userfiles/file/92915943711.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160aeaf9eb56bd---navel.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/rawulusapuvibowitig.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607e153fbbae0---putinolijazuzedujowozo.pdfIn PDF document text
    • http://whkmradio.com/userfiles/file/71115289932.pdfIn PDF document text
    • http://labonscafe.com/userfiles/korito.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/60c157e852fdd612dce37cb2328ea87e/votaku.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca9e9ced79---lixalugepixivat.pdfIn PDF document text
    • https://yumasri.com/assets/ckfinder/userfiles/files/gumina.pdfIn PDF document text
    • http://strandedtattoo.net/file/9094395300.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/mepalowudeten.pdfIn PDF document text
    • http://abakus-routing.co.uk/ckfinder/userfiles/files/19072412535.pdfIn PDF document text
    • https://bahceneryaman.net/public/content-images/files/32053145560.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/movotego.pdfIn PDF document text
    • http://stlukesfp.org/ckfinder/userfiles/files/penuratinugizaxegivuda.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/983a2f17d93a461c63219cc0873b197f/14165689556.pdfIn PDF document text
    • https://amthanhanhsangchinhhang.vn/upload/files/divinovuti.pdfIn PDF document text
    • http://mesterek.net/tmp/rofarofarizenokesadopo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=elder+ordination+certificate+pdfPDF 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_off0000dbc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC6 16964 bytes
SHA-256: 98a68017a358b6506d767266a784322e0f4b75606e5a7afd5a77962cab5d7d17
font_01_sfnt_off000107bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BD 10428 bytes
SHA-256: f1fbdd50a1631def5da74c765c675edd6e0d28f98c574957fa50a22afc73fd71
font_02_sfnt_off00011f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.