Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdeb502dd2db7e07…

MALICIOUS

PDF

77.9 KB Created: 2021-09-19 12:16:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d1e3734233db72f19544dcb808dacb9a SHA-1: c99fe95b01b5d3a7752d7f63a6de0455f975e346 SHA-256: bdeb502dd2db7e07132d7c1f73a6a0465caf14d6bb3fb4e40be1f0a7bf8cd88f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised CMS upload directories, suggesting an attempt to lure users to malicious content. The presence of these links and the overall structure indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161386a51e6950---51977173589.pdf In PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/lotovabal.pdfIn PDF document text
    • http://originalavto.ru/userfiles/file/xasesinelujemufumavi.pdfIn PDF document text
    • http://24hnbc.com/assets/ckfinder/core/connector/php/uploads/files/47006235246.pdfIn PDF document text
    • http://www.weilandensemble.nl/ckfinder/userfiles/files/56820034499.pdfIn PDF document text
    • https://sunwayhk.com/louis/STARKGROUP/ckfinder/userfiles/files/2380715053.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bbdf97ef42---54284497172.pdfIn PDF document text
    • http://depcip.com/app/views/panel/ckfinder/userfiles/files/gigexoxupivura.pdfIn PDF document text
    • https://misbahelmudii.org/ckfinder/userfiles/files/zunubikijesukep.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/f092dbf4d342f2b52049665ac3683509/dekafawevefifixabavu.pdfIn PDF document text
    • http://96rangjai.com/userfiles/file/39572039543.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d01c85ee6a---26437861675.pdfIn PDF document text
    • http://www.pethouse.es/ckfinder/userfiles/files/18382946025.pdfIn PDF document text
    • https://floridahouselottery.com/test/userfiles/file/teremutenut.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/ha0cfmvj80ci2vu8ede156go5d/zumosiga.pdfIn PDF document text
    • https://smsenerji.com/resimler/files/26714507007.pdfIn PDF document text
    • https://www.adom.biz.pl/ckfinder/userfiles/files/kabupirex.pdfIn PDF document text
    • http://xn--9d0b102a6wc3y4a.com/sa_upload/userfiles/file/20210905173555.pdfIn PDF document text
    • https://qian-ho.com/upfiles/editor/files/puxekivozofadagamu.pdfIn PDF document text
    • https://www.bramfordgc.co.uk/ckfinder/userfiles/files/bovatedod.pdfIn PDF document text
    • http://palakkadtourism.in/ckfinder/userfiles/files/dujesimajodepilaxexedaki.pdfIn PDF document text
    • https://anbc31.iscriptscloud.com/app/webroot/files/file/52625309815.pdfIn PDF document text
    • https://associazionemusicaviva.it/uploads/file/guzuloxidejarebofute.pdfIn PDF document text
    • https://sma-dfgg.org/site/admin/file/puverunibotipeba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=tenet+full+movie+freePDF link annotation
    • http://pro.ovh.net/~tribuene/images/banque/file/gigonarid.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_off0000cdae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDAE 17652 bytes
SHA-256: d49e5b55172e9bd3839dcc4eb5cca34dec49bf62b75ef7454d7856c3d055080f
font_01_sfnt_off0000fb56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001136d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1136D 10176 bytes
SHA-256: db6fb2eef130db0e5c98653a1646a3c14ee7ca9dd91ba47070f860818ea68346