Malicious PDF — malware analysis report

Static analysis result for SHA-256 926e065bff8d7acd…

MALICIOUS

PDF

82.7 KB Created: 2021-09-04 15:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 694ff59635e03409d9dcfb3e51da5418 SHA-1: 8e0f6336d932a65f818067d6766a836eac3cc0b3 SHA-256: 926e065bff8d7acd3c622203580c4bbbf28ef03226ff3be7b7d62ffd66819a92
204 Risk Score

Malware Insights

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

The PDF contains numerous links to external sites, many of which are hosted on compromised WordPress installations and appear to be part of a link farm. The presence of a 'download button' lure and explicit password instructions for an archive strongly suggests a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092e36e02353---90938344563.pdf In PDF document text
    • http://studiolorenzoni.eu/userfiles/files/netidudopadakawavozelonuf.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae02eba4099---zopexokilawoxikab.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/wudekotuved.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ddae1e57585---perixej.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1c7db41f9---ragejuva.pdfIn PDF document text
    • http://gyobel.itpublic/file/87438255928.pdfIn PDF document text
    • http://dtcguild.org/clients/80367/File/wawisedujomemasav.pdfIn PDF document text
    • http://www.herbertvanderbrugghen.nl/draft/romovesavivevopakuzinepu.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/167d9d77af9a62471062f36e88db91c8/33088945577.pdfIn PDF document text
    • http://xn--82cac8d3ajrc0gd0bo4a7nf3qg.com/userfiles/files/fovobutejopunotodola.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/161126757aed6e---riwimaji.pdfIn PDF document text
    • http://kimdaiphatsteel.com/Images_upload/files/32515773145.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160803e5412be4---64959572255.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609afef2ef8b1---dasazenejo.pdfIn PDF document text
    • https://brune-schmuckwerk.de/ckfinder/userfiles/files/filerikusogivakozogaru.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/86321535703.pdfIn PDF document text
    • https://www.indoorclub-informa.com/boletines/img/file/neduzesirap.pdfIn PDF document text
    • http://iccjsc.com/images/uploads/files/ziluxodavujasizudafega.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-8/file/1595410433.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160991895d929f---dabogajapemaduv.pdfIn PDF document text
    • https://mediaget.ru/userfiles/files/74840402211.pdfIn PDF document text
    • https://combrooncom.com/contents/files/39729331113.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607732bd768c8---31724752245.pdfIn PDF document text
    • http://ihdbd.org/upload/files/67584370563.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=pdf+export+macPDF 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_off0000e04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04F 10476 bytes
SHA-256: ab0cce316d7fec879728b3e17e8b68dc9ce4a141c340fd176f53b4a71c254cb3
font_01_sfnt_off0000f82c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001103e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1103E 17576 bytes
SHA-256: 5c2235167135fe93899b5365a6e7f96b187bd56dd2125c594c5b39a8e09bcedb

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