Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d7649adc8d7a7d9…

MALICIOUS

PDF

83.0 KB Created: 2021-09-16 04:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6821f742ae7bbc52232bed3d46d323a0 SHA-1: 13a432633d27757782130afabe4afac82f35ff31 SHA-256: 7d7649adc8d7a7d99d36a6ed3717f6a48a500881d00f980a733ccadd2ef4b124
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file containing embedded JavaScript, which is a common technique for executing malicious code. It also features numerous links to compromised websites, including those hosted on disposable domains and potentially malicious WordPress uploads. These elements suggest the PDF is designed to redirect users to malicious sites or trick them into downloading further malware, aligning with phishing and malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ketchas.ru/uplcv?utm_term=pokemon+go+support+android+version PDF link annotation
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16140924c3b33a---dupotutiv.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/55497430111.pdfIn PDF document text
    • https://zaragozadenoche.es/upload/files/14575541539.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16130bf656eedc---15611661212.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/92853366348.pdfIn PDF document text
    • http://kingsfci.com/userfiles/file/ludesemulatelozex.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613528a13be19---mazuguxuwi.pdfIn PDF document text
    • https://best-of-geldanlagen.de/userfiles/file/57183164304.pdfIn PDF document text
    • https://inprovitcentroamerica.com/ckfinder/userfiles/files/xemizitokarobofik.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/161365425591ef---duxebusekavodujurutanug.pdfIn PDF document text
    • https://www.huaikrachaohospital.go.th/assets/global/lib/ckfinder/userfiles/files/wufewexewizobavekevizo.pdfIn PDF document text
    • http://www.stsmcc.org/www/js/ckfinder/userfiles/files/87578097244.pdfIn PDF document text
    • https://appvid.eus/userfiles/files/82065738840.pdfIn PDF document text
    • http://ratchee.com/ckfinder/userfiles/files/87898003168.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130d88ec2df3---litobufagajonotawuvepol.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142a1118c2df---11345908064.pdfIn PDF document text
    • http://tctrack.vn/images/newtech/files/81057777049.pdfIn PDF document text
    • http://dsverano.com/UserFiles/File/22301939268.pdfIn PDF document text
    • http://truhlarstvi-strakonice.cz/files/file/76068142927.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/rijuvuwujo.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613624a5e3677---77851238192.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/161428916774a5---40108810322.pdfIn PDF document text
    • http://npk-bypassdrr2.com/file_media/file_image/file/55038120208.pdfIn PDF document text
    • http://autoklej.pl/app/webroot/media/files/sezupepasuf.pdfIn PDF document text
    • http://beta-rc.com/upload/files/ravaduk.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_off0000d90a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90A 19332 bytes
SHA-256: 00c5788b0d99cec38ea7095c7b8e624237d1ccdce360b4c63c37e1da5357d1f7
font_01_sfnt_off00010be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE4 10948 bytes
SHA-256: 289bf3c3032bfd91bae8fc10e819cd5e41ed68a769973e2d2ef706c894d24b2a
font_02_sfnt_off00012521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12521 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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