Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc660b402143ddd…

MALICIOUS

PDF

72.7 KB Created: 2021-09-07 06:08:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a054b3dd7b572c14ea6c4c294168c2cd SHA-1: d60d70075e456ab72e7053870b62b0b86e2c1251 SHA-256: afc660b402143ddd85bc5f649266ac1afc62d91c86946e9026f1c56c337d7874
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites, likely intended to lure users into downloading further malicious content or visiting phishing pages. The presence of multiple external URIs and link farm heuristics strongly suggests a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f7607fc84---jopimepikadoxeviri.pdf In PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091b3fd97cf5---523019430.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/36934318457.pdfIn PDF document text
    • http://pataibicaj.hu/userfiles/file/68796149496.pdfIn PDF document text
    • http://master-sign.ru/ckfinder/userfiles/files/11812705614.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607841758ed2d---50162093382.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed8283df2e---26466044299.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///katexuxegawobovevuwato.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/witapagekasew.pdfIn PDF document text
    • http://quangcongluc.com/upload/files/27932884705.pdfIn PDF document text
    • https://biovuspharma.net/userfiles/files/mexakemuxozule.pdfIn PDF document text
    • https://koffiewarenhuis.nl/app/webroot/files/userfiles/files/20584615620.pdfIn PDF document text
    • http://leoclubmarsala.it/userfiles/files/94476651446.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/c9798b16313b16438885026f750e0260/36612659072.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/vatimikodof.pdfIn PDF document text
    • http://rauvuonsach.net/images/uploads/files/58708486458.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/zewijojawufi.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075daae53112---2436390747.pdfIn PDF document text
    • https://siahotel.com/userfiles/files/wenedafobinejisujekirim.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/39790785433.pdfIn PDF document text
    • http://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/67848429432.pdfIn PDF document text
    • http://1night2day.com/ckupload/files/34510225484.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611aa97d2beea---maxorovilikovilet.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16123635079382---pelofugavorano.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607060ad73c41---16039879267.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=convert+pdf+to+word+desktop+software+free+downloadPDF 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_off0000baeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAEB 15884 bytes
SHA-256: e6181697bb2972e0f68da1d577763981083e9d49c58557fab8b2fe1bd671f432
font_01_sfnt_off0000e3b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fbc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC7 10672 bytes
SHA-256: 7a3cfc266e8f2f2f5acc098a45f25c543f33f630447da3beebf06e0a1bdbe55c

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