PDF malware analysis — malicious · bb124d44f3a27da8

MALICIOUS

PDF

87.7 KB Created: 2021-07-16 20:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 9e349368584ca26961aeb435e9bcfe56 SHA-1: f06c15f237c1243a0f352c74a5f8bd13da652987 SHA-256: bb124d44f3a27da8263c74523d115bf83bce459b84d609788d0314340c220eb7

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress upload directories, which in turn host other PDF files. The primary purpose appears to be redirecting users through a chain of links, likely to deliver a phishing page or a second-stage malware payload. No scripts were extracted, but the structure suggests a phishing or credential harvesting attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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 https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/32eda43dd399c736cc8668f8a48e63a2/60392310885.pdf In PDF document text
- https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/hatqgp2cpaklgb3imgjikjtrl0/rekerafokidasax.pdfIn PDF document text
- https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/07172a7cea7cf365e5c37f2baea319d4/5960892695.pdfIn PDF document text
- https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16090f233d1155---39584971280.pdfIn PDF document text
- http://whuntex.ru/userfiles/file/wixogid.pdfIn PDF document text
- https://bititechnika.com/uploads/file/62415675944.pdfIn PDF document text
- http://rgn2u.com/userfiles/files/90691770753.pdfIn PDF document text
- https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/839ff16f429f907747c64a71ee48d317/zopupefupejawewepiwaz.pdfIn PDF document text
- http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f04885fca1---jopojowirefulibogap.pdfIn PDF document text
- https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/049743db73ac3f2ef65abc2031d2045c/nimal.pdfIn PDF document text
- https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607592e6762bc---pevunogikosesopuz.pdfIn PDF document text
- https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/2192186bfddb08000aee33abe929ce12/99490502360.pdfIn PDF document text
- http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3dda93239---4859696736.pdfIn PDF document text
- https://larustt.com/upload/ckfinder/files/18740043969.pdfIn PDF document text
- https://broadcasthub.com/ci/userfiles/files/vopavilojamivev.pdfIn PDF document text
- http://bungefamily.com/clients/5233/File/suzutadelezet.pdfIn PDF document text
- https://thailonghoang.vn/upload/files/2539186271.pdfIn PDF document text
- http://tamlaproject.com/userData/board/file/gafoxakopekatixomukiwaweb.pdfIn PDF document text
- https://promise-land.com/upload/file/jurupado.pdfIn PDF document text
- http://zabradli-znerezu.cz/userfiles/file/beruperujejopolowogawon.pdfIn PDF document text
- https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/b1k2r1b1qmt5bh8uh9gcafhov3/91927562569.pdfIn PDF document text
- https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082eb24c02d3---worosik.pdfIn PDF document text
- https://bevillelecomte.ovh/ckfinder/userfiles/files/mejefovukupemaxix.pdfIn PDF document text
- https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160965b78b68df---18430819671.pdfIn PDF document text
- https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160753758e98ba---jomix.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=giant+swallowtail+butterfly+eggsPDF 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f3f9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF3F9	16892 bytes
SHA-256: `90ee3049c774f04713f0994ab51fa5bd3b77f88373e189094d56b6fa98568893`
`font_01_sfnt_off00011fe5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11FE5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000137fc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x137FC	10868 bytes
SHA-256: `c48aee879b2d39c1a0d1640d5d73694404f8a253c746eb94b842bcfc7c56bc0d`

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