PDF malware analysis — malicious · 46a738b22539cb80

MALICIOUS

PDF

83.8 KB Created: 2021-09-22 10:20:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 5b5a80b47873f83406ae69e0f70965d5 SHA-1: 247ce368f0eccb715391773864dca4c5b892bc0f SHA-256: 46a738b22539cb80a8492b379e96ea289c0f4d4d0a4e4af57a11dece666e88fa

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites, including WordPress upload directories, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, likely intended to exploit users through social engineering or by directing them to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://ketchas.ru/uplcv?utm_term=redmi+note+7s+update PDF link annotation
- https://penmypoem.com/new/admin/uploadfiles/file/roxeligibizonunakidopixik.pdfIn PDF document text
- http://www.rsvpcatering-ar.com/files/imagesfile/16806528091.pdfIn PDF document text
- http://getsolarnj.com/userfiles/file/vezozi.pdfIn PDF document text
- https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/161454e8a85e4a---13311551148.pdfIn PDF document text
- https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1612f73fada4ff---73268434473.pdfIn PDF document text
- http://htwy.com/upload/file/xedesisetoxukapure.pdfIn PDF document text
- https://abyway.lv/images/ck_images/files/fajili.pdfIn PDF document text
- https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/038kj1mjor2c673i610868m3ge/tofijax.pdfIn PDF document text
- http://corse.annuaire-regional.com/ckfinder/userfiles/files/baduduwunilobofujiwos.pdfIn PDF document text
- https://tl-systems.hu/files/files/tanizobamakoguw.pdfIn PDF document text
- https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134707113f79---98373525935.pdfIn PDF document text
- http://ichieh.tw/uploads/files/202109081301399210.pdfIn PDF document text
- https://pmapmc.com/userfiles/image/files/runujusesipobekelikifi.pdfIn PDF document text
- https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/c647ad8ada14e7a48cf64a157bc5c77e/femojulizafutola.pdfIn PDF document text
- https://www.vconsole.com/ckfinder/files/42546451986.pdfIn PDF document text
- http://drivingschool-brno.eu/files/29198500458.pdfIn PDF document text
- https://kanalprofi.at/UserFiles/file/rizurekupe.pdfIn PDF document text
- http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16131ccf7046f0---62720126656.pdfIn PDF document text
- http://klasykarozrywki.pl/public/images/fck/file/foviligalumume.pdfIn PDF document text
- http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161406846b289f---78029035461.pdfIn PDF document text
- https://grancom.by/upload/docs/5670765177.pdfIn PDF document text
- http://dietetyka-24.pl/images/files/52349110192.pdfIn PDF document text
- http://www.psoealora.es/ckfinder/userfiles/files/25348307348.pdfIn PDF document text
- http://happy-land.hu/editor_up/xedoson.pdfIn PDF document text
- http://cserepakcio.hu/xdata/file/tonefalupoputogisubig.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e2ee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE2EE	17912 bytes
SHA-256: `c8eb04dcc80dbf1195ed6e0b6bf3c398af331a7e9ff8fb980da66eb53b068a30`
`font_01_sfnt_off0001115b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1115B	10600 bytes
SHA-256: `3968a9ac65a9ad10c800515bb0a94d41f471c3b6952468fe69c6f36ffd33786f`
`font_02_sfnt_off000129a7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x129A7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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