Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfaa0fec5f32b233…

MALICIOUS

PDF

90.4 KB Created: 2021-07-22 16:35:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ef1cc173ad83fbc23e0cb92604a2b396 SHA-1: 93fe71f4f6aab8ad76059102a452e50ec231b4a0 SHA-256: dfaa0fec5f32b2334cd3ec197d8bb1767fdc927bd68ff34f1ffb9785052298de
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The embedded URLs and the heuristic firings strongly indicate an attempt to exploit users by directing them to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://cathayred-csr.com/img-cathay/files/68150172349.pdf In PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/46ac7a2fff3fdb3137cea5225e644619/68064179092.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796b0f97fdd---wutexajupinu.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ad6aa0219---varifoveruwadisibonuvedav.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/185e228b430c99d7fee3e9cc8da721db/85284867298.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/xuwapoxogiberiwixala.pdfIn PDF document text
    • http://bmsorganica.com/userfiles/file/pexiwipatakavuxizudikad.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/98386218684.pdfIn PDF document text
    • http://righetti1970.com/clients/872956/File/63149872587.pdfIn PDF document text
    • http://talk200.com/admin/admin/uploadfiles/file/3469734182.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/qdckolm1a68aikkrtbebiue0l0/semetojifisagipozakirok.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d490b86be---zibidiku.pdfIn PDF document text
    • http://standardamulet.com/files/files/57264672638.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog//file/84478521985.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a983858edec---degatugivoj.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/rofuwafo.pdfIn PDF document text
    • http://maxidmum.com/images/upload/fck/file/kikinabulakuzu.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/uprfc7c84l5t44vj5d454428b7/22568476795.pdfIn PDF document text
    • https://willmarlakesarea2040.com/ckfinder/userfiles/files/remuvanexa.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1843ad84ab---fajexuzotatim.pdfIn PDF document text
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/safumuxu.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/nkf6la31ofjeoqgeaqm386ekq6/mozeporaliwoj.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160af5a330edce---boloriguga.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/93404594540.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=importance+of+teamwork+essayPDF 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_off0000fd91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD91 17140 bytes
SHA-256: 796a963336d65ad87e30d0ef0b9e96fd7123a9296f4e44ab2569dd02ed9903aa
font_01_sfnt_off00012a18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A18 10744 bytes
SHA-256: 4c19bd2bbf182122651999d5d18af16c1446878c76decf5c776a6b5ff80e9df3
font_02_sfnt_off000142ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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