Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbd794a1fc0f2df8…

MALICIOUS

PDF

67.7 KB Created: 2021-09-26 07:21:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 192386666f00c413c79a5d8c9281c8a6 SHA-1: de9fc8089cf75a80e9e4e455197c1ee784f30d76 SHA-256: dbd794a1fc0f2df87e95c9e0dc6763fd547a86fa18cb4533e19ae5eaa42bb1aa
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as a phishing lure, likely intended to trick users into downloading malicious content or visiting a phishing site. The document is image-heavy and contains multiple links pointing to potentially compromised websites, suggesting an attempt to redirect users to malicious destinations. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 67 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 https://agregadoschucuri.sinecsas.com/ckfinder/userfiles/files/wutupupawobikudo.pdf In PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/b55202719d141072906e2af66e56947a/figiwijigotelaturerapu.pdfIn PDF document text
    • http://0965818789.com/CKEdit/upload/files/51621888368.pdfIn PDF document text
    • https://gopherscopes.com/userfiles/file/75827266160.pdfIn PDF document text
    • https://winstar-tools.com/UserFiles/editor/file/91567541848.pdfIn PDF document text
    • http://jewelry-shopping-city.com/uploads/files/202109120036262609.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/q94secif49b6ijj40cti7alpr5/75869213721.pdfIn PDF document text
    • http://bakefruit.com/uploads/files/202109051019347437.pdfIn PDF document text
    • https://divanich96.ru/admin/ckfinder/userfiles/files/xoduwibazav.pdfIn PDF document text
    • http://www.szphotar.com/admin/img/files/77060730234.pdfIn PDF document text
    • http://daugiavanthienphuoc.com/media/ftp/file/tuviloviresedikifitoru.pdfIn PDF document text
    • https://incoyun.com/calisma2/files/uploads/2348295921.pdfIn PDF document text
    • http://gucaoyun.com/uploads/file/161523548979.pdfIn PDF document text
    • http://ndt-ultratech.com/files/javixiwiwotetubamilove.pdfIn PDF document text
    • http://4els.ru/uploads/images/files/24277782753.pdfIn PDF document text
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/tanomijowuwutikatix.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/35655061644.pdfIn PDF document text
    • https://equantumconsulting.com/files/files/zefukuxusedomudimot.pdfIn PDF document text
    • https://europartner2.pl/uploads/dumaximinolez.pdfIn PDF document text
    • http://athaj2.specialty-match.com/upload/files/38849322419.pdfIn PDF document text
    • http://usateatop.com/_upload/files/dimiwoxakazakofupesamu.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161302182db36f---gumam.pdfIn PDF document text
    • http://poaglasses.com/uploads/files/202109020715326603.pdfIn PDF document text
    • http://e-restauracion.com/app/webroot/files/uploads/files/16099233658.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=pokemon+fire+red+free+download+for+androidPDF 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_off0000aea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA0 13996 bytes
SHA-256: 754c0601383a5a85610642041bd7416a01b8cad239151d2be09ebbeef8e09d7d
font_01_sfnt_off0000d165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD165 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e97c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97C 10428 bytes
SHA-256: 9f91121478b08106d2f842ee50c3acb8c54875650111890db3d05869c2d6e434

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