Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5c29c30a4ba04f0…

MALICIOUS

PDF

68.8 KB Created: 2021-09-25 19:12:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 073884cec6ba78c016e798cfb48cf90e SHA-1: 381c4bbfc3f0ceb4adeef408032bda6777325ae2 SHA-256: b5c29c30a4ba04f01059c9151a97353d31a9ef9c0c9521a3e71ba04fb375bcfc
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. Heuristics indicate it's an image-only document with an action trigger, designed to look like a screenshot. Numerous links point to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the overall structure and URL patterns are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://studiospazioambiente.it/userfiles/files/gixitim.pdf In PDF document text
    • http://szpitalstrzelin.pl/userfiles/files/69513228154.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16131f94cf2d5e---xopomasiban.pdfIn PDF document text
    • https://pulsekb.ru/admin/ckfinder/userfiles/files/70677461647.pdfIn PDF document text
    • http://bresky.cz/res/file/14182102817.pdfIn PDF document text
    • http://restaurant-lyons.fr/userfiles/file/44394739517.pdfIn PDF document text
    • http://smelawservice.com/file_media/file_image/file/gunuvowufelatukuwoto.pdfIn PDF document text
    • http://kingsbrite.com/kingsbrite.com/userfiles/file/87020805214.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/161389e35d0376---zawatikobubozojarojowiwir.pdfIn PDF document text
    • http://sjzhtchem.com/upload/files/45052979353.pdfIn PDF document text
    • http://studiopedrazzini.eu/userfiles/files/54114353186.pdfIn PDF document text
    • https://espritgt.com/userfiles/file/finuko.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/77834519877.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/h979pgt0nfmdmkonjecruccs28/wakunazenef.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/41158503910.pdfIn PDF document text
    • https://natyabio.com/uploadfiles/24607791483.pdfIn PDF document text
    • http://blueleaves.ru/userfiles/file/1981177101.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613da891afaf3---17598235602.pdfIn PDF document text
    • http://thietbiytedaibao.com/media/files/98208193473.pdfIn PDF document text
    • http://okun.su/upload/file/76426283216.pdfIn PDF document text
    • https://mollis.rs/files/tugodub.pdfIn PDF document text
    • https://szabobuszberles.hu/files/files/33637796079.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/69708764467.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=panga+full+movie+watch+onlinePDF 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_off0000b12c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB12C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC943 10768 bytes
SHA-256: d56ec411e751e495a671636d64ae05c1aaef05db17f970759b4a4789aa0af352
font_02_sfnt_off0000e1ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EF 14332 bytes
SHA-256: 91b1195a5b3ea4d7e29e35c6d9777b311696990f6f93846491fb9e27550f9982

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