Malicious PDF — malware analysis report

Static analysis result for SHA-256 db585d70acd4dfa4…

MALICIOUS

PDF

68.1 KB Created: 2021-09-25 21:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 9022956b62464e49f63a982e45b0296a SHA-1: 2fdc40984882e5ea962753eb4015dfb5fa17cac2 SHA-256: db585d70acd4dfa40b2ffbba022763bc8f63fad51f0c5304b018a8f9096ea76f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF employs an image-only lure, a common tactic for phishing or malware delivery. It contains numerous external links, including one pointing to a compromised WordPress upload directory, suggesting it's part of a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for distributing a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://ketchas.ru/uplcv?utm_term=download+wonder+woman+1984+full+movie+free PDF link annotation
    • https://yomadesign.com/userfiles/Proj_Name/files/59515948479.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/b6c03c0419a684fffba335b0f4b0418b/govunulaniva.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/1045763023.pdfIn PDF document text
    • https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/paluwovenuw.pdfIn PDF document text
    • https://eclearusa.com/images/file/vamodowusuvox.pdfIn PDF document text
    • http://sperrincaravans.com/images/file/gexuritatomezonulefisi.pdfIn PDF document text
    • https://culturasiapamplona.com/guiarte_userfiles/files/fapatinogakijubuduro.pdfIn PDF document text
    • https://itscebu.com/upload/file/20210901084624.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130607198f8b---zadubavoriwukuvakinibax.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/79267803c2e5d23813c4e034bda1724a/30671855160.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/demelajogozodewominufu.pdfIn PDF document text
    • https://fabriziochessa.it/userfiles/file/komuxuxebevula.pdfIn PDF document text
    • http://progettocecinacuore.it/writable/public/userfiles/file/sitonufifaru.pdfIn PDF document text
    • https://inprovitvenezuela.com/ckfinder/userfiles/files/defumaxatevexinijikav.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/diremiwapipavapopimes.pdfIn PDF document text
    • http://www.firstpages.eu/app/webroot/files/userfiles/files/89110215356.pdfIn PDF document text
    • http://24horasnoar.com.br/ckfinder/userfiles/files/lofaralofunogojene.pdfIn PDF document text
    • http://babyindex.nl/images/uploads/velimuxefeb.pdfIn PDF document text
    • http://hcm-invoice.vn/hinhanh_fckeditor/file/71253705857.pdfIn PDF document text
    • http://cattaneoarchitetti.it/userfiles/files/74125362725.pdfIn PDF document text
    • https://netkat.in/ckfinder/userfiles/files/dimulezolimisikasisitomi.pdfIn PDF document text
    • https://mbzl-pro.xyz/web/img/podborky/files/lobajolimesedasewarasuren.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_off0000adec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5FE 14104 bytes
SHA-256: ae8c0f456b70fbc60fbf7b382ec6cad3b66257da6aae1ef3959e1900cd60d884
font_02_sfnt_off0000e920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE920 11008 bytes
SHA-256: 5559a5cbc81b8dfabe75dec211475f0a313f0bec879f77e67cc590d66dbed2e4

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