Malicious PDF — malware analysis report

Static analysis result for SHA-256 b42cc0ce4cebbe11…

MALICIOUS

PDF

93.8 KB Created: 2021-09-06 02:10:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e191e5f8609e7a18ddeb0611b2603399 SHA-1: 8d840982ba148f8ebe9cf00db921fe413de5b117 SHA-256: b42cc0ce4cebbe11fa8f3934305e076ee8dac62d19572b7a95da4f8047370a8f
176 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous heuristics fired, pointing to the file acting as a link farm, embedding many URLs that lead to compromised CMS uploads and potentially disposable hosting. The primary attack pattern involves directing users to these external sites, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/b98fd7c7e3e8ae77f8d9dd2fc2bf66c7/motakow.pdf In PDF document text
    • https://www.newhorizonscrisiscenter.org/ckfinder/userfiles/files/60300721262.pdfIn PDF document text
    • http://it-hair.com/userfiles/76874765938.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca52e74b11---91262871241.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/zadovumokekodulinebe.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/jijupoliki.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8400dccf5---74748900696.pdfPDF link annotation
    • http://dwallacelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fajogatakojirowisule.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/jshvu5uhr09kstcsliperc4j70/34767264433.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/38132bc02c38b054e8e6fc26d2b242a2/4634578966.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a72fd23ab08---bukiponavu.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/70846774452.pdfIn PDF document text
    • https://airshow-bg.com/file/vabegodumuz.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/kurazi.pdfIn PDF document text
    • https://toolsatool.com/userfiles/files/92090405640.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/13480080632.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/jareja.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/5ebe2be3bdeab1422581f1d1399e59c3/23524955826.pdfIn PDF document text
    • http://dpholding.ru/uploads/files/84689783296.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4e201d113---25767629776.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/saxexufix.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/9m8ni29o40hbvaatu4nnkaf3c3/75415233913.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/f46cnboan9dqrceuepk9gbtqog/kerolalowatuvu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=application+of+polarimetry+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_off000109fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109FD 10708 bytes
SHA-256: d10e881251088853528e425366c2bc801c69b28af0c9c25fcb21361a4d31d2bb
font_01_sfnt_off0001229f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1229F 18228 bytes
SHA-256: f4db4d6e786fe210bb491e8ff195c5646ddde678d655245a6261f8f226f51bef
font_02_sfnt_off00015199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15199 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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