Malicious PDF — malware analysis report

Static analysis result for SHA-256 a70c1730aecbee76…

MALICIOUS

PDF

82.9 KB Created: 2021-07-13 07:30:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 76d0be3ebe2d2dc6a4d676fb3ce9933a SHA-1: 06fb0983b5bf11234c522dfcf53ed4354eeb1e91 SHA-256: a70c1730aecbee768fd09b1638450ea01c2c3ed92c25f87f7838f119c087a882
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically related to phishing. It contains a large number of embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The ClamAV detection further confirms its malicious nature, identifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://medvor.ru/uplcv?utm_term=to+let+meaning PDF link annotation
    • http://arslanemlak.come/file/10886658977.pdfIn PDF document text
    • https://lesfeesdelhetre.fr/upload/files/dizisujifotuvepenig.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbdcea2e9f---ximeme.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/8837084079.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/votojo.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/6813b8799ab892a3d2fcfa591bb75242/lowopoxuxafatu.pdfIn PDF document text
    • http://stavebnevyrobky.sk/www/upload/files/83565688386.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f83c91ef0e---gabaledituvin.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/3986869728.pdfIn PDF document text
    • http://tongdaidoanhnghiep.com/app/webroot/upload/files/51100778166.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160916d5215a0a---39503192364.pdfIn PDF document text
    • http://churchontherockuk.org/home/churchontherock1/public_html/userfiles/files/barokugijoga.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/61fc59c979b1bc2483cda14864217a5f/75802913779.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609406865bc19---lowusa.pdfIn PDF document text
    • http://reikihaus.com/clients/75291/File/77179258062.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/eb69686ea2bb3960fdfc9fb95449f1de/47268673695.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/79048498111.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/dibunigakil.pdfIn PDF document text
    • http://gdlianyu.com/uploadfiles/file/dupelaxikaxadazakava.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a05590ee447---fokumirusulivuwav.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/c2900f4ed2493fa8dc6cdf078bb0a40e/jezemuxexomewur.pdfIn PDF document text
    • http://topenglish.sk/app/webroot/gallery/files/51248438878.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/juligoxumimulefudira.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_off0000e3ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AE 17280 bytes
SHA-256: 02603241568b592f1e4c4794502675d5a62ffe1903b765be3d7eba0f23ca178b
font_01_sfnt_off00011046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11046 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001285d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1285D 10148 bytes
SHA-256: 54904a9f05cd615e30911cfd5287cbe63f056abfee78f98c74df37fbc0a09252

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