PDF malware analysis — malicious · 89d322defc451590

MALICIOUS

PDF

83.8 KB Created: 2021-07-06 20:16:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 15963ffa245b7a2a6d8f8991b4772d14 SHA-1: e10dc213fe1e6fdd203396254cce6fdbf52cc1c3 SHA-256: 89d322defc451590d01c5f610a9d41e55f236fd5fc0842f18ee6f32a4cac22ca

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous links to external domains, many of which appear to be hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to redirect users. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics strongly suggests a phishing or malware distribution scheme. No scripts were extracted, but the overall structure points to a malicious document.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

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://c-amc.com/upload/files/kubuwoxamezusi.pdf In PDF document text
- http://hawks79.com/clients/85064/File/69650192017.pdfIn PDF document text
- https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/2b53ac065982243bde5ff767a891770b/78425690225.pdfIn PDF document text
- http://yilip.net/userData/board/file/22523894655.pdfIn PDF document text
- http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f9e59995a---4538522254.pdfIn PDF document text
- https://moscowfashion.net/content/xuploadimages/file/batifi.pdfIn PDF document text
- https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/08ca136e8eb74f553ed6bd998746b344/2289756310.pdfIn PDF document text
- http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607072b446c08---vinisejubururig.pdfIn PDF document text
- http://www.findvoters.com/userfiles/file/kiwotuwakurewekodawu.pdfIn PDF document text
- http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b78d680e6f2---93164192752.pdfIn PDF document text
- https://nanyangtextile.com/userfiles/file/2633996851.pdfIn PDF document text
- http://korvet-sp.ru/userfiles/file/10877255936.pdfIn PDF document text
- https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/d43ed064a82cca73b405fe14a45e61a2/76832525312.pdfIn PDF document text
- http://omonetach.pl/foto/ilustracje/file/fipejokaw.pdfIn PDF document text
- https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/8c52c90b3c5ce9456c7487d30cde5d94/taremidimodomisadubipuxig.pdfIn PDF document text
- https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba864c2b51---42442330731.pdfIn PDF document text
- https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/9badebb0204c6ab4ae7e692389a486e4/10621024230.pdfIn PDF document text
- https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9f2ae3f9af05d19923db272eaea1e5cc/gogopawoweloruj.pdfIn PDF document text
- http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/6d10a4b1e4b7114ba8d596af8d5db8b1/zakupinegawuridiziwodu.pdfIn PDF document text
- http://allprintusa.com/admin/images/file/fazuboverevatajota.pdfIn PDF document text
- http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/nrrkp1qbjnvdcfsoiv35dv3vh0/29751951046.pdfIn PDF document text
- https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e34b6ebff7---42423276692.pdfIn PDF document text
- http://www.physedu.in/newsite/userfiles/files/mutujuwiribimoritu.pdfIn PDF document text
- http://3dtechgroup.com/uploads/image/files/kawomagixiwudo.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=normal+fasting+triglyceride+levelsPDF 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_off0000e5f7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE5F7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fe09.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE09	16388 bytes
SHA-256: `2ccdaf31b7e07e4336e120206921e73525c0f73aa30db12bb717a2d17c6dc11a`
`font_02_sfnt_off000128a0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x128A0	10976 bytes
SHA-256: `543bafade342e35bf3c84b8180623b64b777c0bf115197bbb2d6f6a103e79727`

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