PDF malware analysis — malicious · 001bf77031fee854

MALICIOUS

PDF

91.5 KB Created: 2021-09-05 23:01:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 37dc24aac6d69fdde91bd2e328dc9776 SHA-1: 8765ef26b2294e882c08f3726de560f533200388 SHA-256: 001bf77031fee854d7825a604e676967509ab058a6f7632aafc3a527ad99cda1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users. While no scripts were directly extracted, the presence of external links and the nature of the heuristics indicate a phishing or redirection attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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 http://scantech3d.com/files/26055216694.pdf In PDF document text
- http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/4vr0l2m37l332q7dgc3i7o1la6/loraderugig.pdfIn PDF document text
- https://mediaget.ru/userfiles/files/geradudixabajaleros.pdfIn PDF document text
- https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b46227d4552---susuzalitasiwolik.pdfIn PDF document text
- http://boeschfamilytravels.com/clients/43210/File/piregude.pdfIn PDF document text
- https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/0b674d75a11f4396135985c4488b8016/92204160965.pdfIn PDF document text
- http://karpatskiles.ru/store/files/tulugerod.pdfIn PDF document text
- http://vitalbafitnessclub.eu/userfiles/files/nidofobodadise.pdfIn PDF document text
- http://j1medical.com/uploaded/file/30988370381.pdfIn PDF document text
- https://repare-ton-smartphone.com/userfiles/file/13844497277.pdfIn PDF document text
- http://chickendaylacrescenta.com/uploads/files/jaremeta.pdfIn PDF document text
- http://tw-jia.com/uploads/files/202108200944229478.pdfIn PDF document text
- https://hamayeshniroo.com/shop/file/9888761551.pdfIn PDF document text
- http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b285ff306f9---marepatup.pdfIn PDF document text
- http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/8gqaobetooq1k419j5seaeiraq/85256537056.pdfIn PDF document text
- https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/5f5123487142c526d979412f9114fd27/fobadomegonemerupubagu.pdfIn PDF document text
- http://bukharageorgia.com/sites/default/files/file/53759149529.pdfIn PDF document text
- http://baugeraeteverleih.de/benutzerdateien/26632592480.pdfIn PDF document text
- https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f41321a723---8213101884.pdfIn PDF document text
- https://gitedu.in/ckfinder/userfiles/files/nibupoxa.pdfIn PDF document text
- https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160803f3c2fa3a---25789026848.pdfIn PDF document text
- https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161206aecd1275---76548016754.pdfIn PDF document text
- http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160845e8f1748e---66978378279.pdfIn PDF document text
- http://mdsalon.ru/img/lib/file/64214101918.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=cancionero+de+palacio+pdfPDF 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_off0000fc24.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC24	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001143b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1143B	10380 bytes
SHA-256: `f4f52d0cca1f13fb07dfefcbe1d669079616ce8257482b7379c4927f7f597601`
`font_02_sfnt_off00012bc2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12BC2	20796 bytes
SHA-256: `dc5dc384f3231e86f6bb69109e5ae64ed329fdfd93ee9aa204ec9670f59095de`

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