Malicious PDF — malware analysis report

Static analysis result for SHA-256 04b124e4471122bd…

MALICIOUS

PDF

86.9 KB Created: 2021-08-03 09:32:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7d16c23ce6065e605c2cbd62ba468cd4 SHA-1: 77ab87fc448a9270bebb4881c6d7295f9ffb2d49 SHA-256: 04b124e4471122bd692cfc21d94b158b0c5a285bc9168261cb6f89b0f40ae113
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links pointing to compromised websites, suggesting it is part of a link farm designed to distribute malware. The presence of a 'download button' heuristic further supports the lure of downloading a malicious payload. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification confirm its malicious nature, likely serving as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/29be4ec5c01dd02171389a0284ba2511/taruxakuvolukix.pdf In PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160b656b0097b7---24578198476.pdfIn PDF document text
    • https://agermag.ro/mm/file/44300035636.pdfIn PDF document text
    • https://bloomeng.com/uploads/foxoseri.pdfIn PDF document text
    • http://tccsrl.org/userfiles/files/koxerifariwimexebafu.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16085aa4459749---91398664739.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f147ac3c41c---dolosar.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd6aec4a4db---gofebivedafitum.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4a7d7e9a1---36933352908.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a16f7c158e8---fakekujemiramegujigef.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/60397028892196395c0a8fd2bb32e880/pakozux.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4be71d9231---nawijitupagakoxa.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/n575o0s7597lsq1vmb58ps85rt/dumiretubeluvukoviv.pdfIn PDF document text
    • http://fsgpj.com/upfolder/e/files/20210609183843.pdfIn PDF document text
    • http://srtprogetti.eu/userfiles/files/lerurer.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16092dbd5080d5---vesofefixi.pdfIn PDF document text
    • https://eitmedu.in/ckfinder/userfiles/files/xazekibinu.pdfIn PDF document text
    • http://eco-building.cz/UserFiles/File/87779150391.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/2c6204a570f8e908579ffbcb3e0c63a8/56181282243.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/908d8faaa0684f0512f8954e68d18ae1/42929597722.pdfIn PDF document text
    • http://myboydfamily.com/clients/7/7f/7f513a2250c12de81a70a6735749c289/File/lugebobewevabeparilijere.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/320oq20bvhj7g2ifnaqoq2crl4/60354017925.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/98347865847.pdfIn PDF document text
    • http://thomas-reunion.com/clients/8/86/86f5f051d314e00f57792b8428d7085d/File/38079424675.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/4d55c5ef03e150de0aabbf01aaca9176/zeperosevusoxobiwodukupa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=free+download+pdf+to+word+converter+software+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_off0000ea07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA07 19304 bytes
SHA-256: fc84c6579ac198f406baa96be2f070193aab9ab0c698ab508453c78c26c245d4
font_01_sfnt_off00011c11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13428 10744 bytes
SHA-256: ac6fd6f64ecf2983113a0518d81ecb93630729d42ae0872c32c2d45f6b85a990

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