PDF malware analysis — malicious · bbf74fb2b5fe309f

MALICIOUS

PDF

82.3 KB Created: 2021-09-17 03:28:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: cb62b0aba8abed95ebc4c243785df4eb SHA-1: 86f3ad7668c01381cf47222d6150d8131980020e SHA-256: bbf74fb2b5fe309f893293e0240390f65aee6e4e06047a63994aa01776524321

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely intended to redirect users to malicious content. The PDF structure itself is indicative of a link farm, with multiple embedded URIs designed for redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://k85shj16h-561lt.com/contents/files/dusosomoxorokavolevurudi.pdf In PDF document text
- http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16131dc2c79a2e---xalutabajizijaxipaf.pdfIn PDF document text
- http://jfhconsultancy.nl/userfiles/files/sapowubinisezuwekedif.pdfIn PDF document text
- http://abwclayton.com/uploads/files/doxivikofufofom.pdfIn PDF document text
- http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16134e7e174543---bodikovaja.pdfIn PDF document text
- http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/161342d3dbddf1---zoralamuwazebomifaturo.pdfIn PDF document text
- http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/dosofefejodo.pdfIn PDF document text
- https://orig-shop-gsm.ro/ckfinder/userfiles/files/50994333387.pdfIn PDF document text
- http://sevenseahotel.com/uploads/images/files/rozigiti.pdfIn PDF document text
- https://tidaksusah.com/contents/files/27168383223.pdfIn PDF document text
- https://magyar-logyogyasz.hu/fileok/file/rovanubixamojeduguzoxuna.pdfIn PDF document text
- http://tnslib.tools/userfiles/files/kulafogejoxosifogidus.pdfIn PDF document text
- http://gaytonfa.com/upload/files/22700128077.pdfIn PDF document text
- http://cmsrecuperocrediti.it/images/file/2368619002.pdfIn PDF document text
- https://dazhonghua1688.com/ckfinder/userfiles/files/tovijasob.pdfIn PDF document text
- https://suativisamsungtaihanoi.net/upload/files/70897440322.pdfIn PDF document text
- http://bangiyaparishadtoronto.ca/bpt/editor/uploadfiles/zujixulotafudus.pdfIn PDF document text
- https://thehideawayresortpattaya.com/userfiles/files/rizejakegidebo.pdfIn PDF document text
- https://navliecky.net/userfiles/file/fujunadukosifiganilax.pdfIn PDF document text
- https://www.terraton.com.my/ckfinder/userfiles/files/tixev.pdfIn PDF document text
- http://lexuspolymers.com/assets/ckfinder/userfiles/files/jepopunipipetewabatapaji.pdfIn PDF document text
- http://palaciodelosnavas.com/userfiles/file/gupetedujedulewuxuvil.pdfIn PDF document text
- https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1613006599d793---bowulifebimamabo.pdfIn PDF document text
- https://marthomaktrplrdiocese.org/ckfinder/userfiles/files/70463071055.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=technomantu+magic+followersPDF 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_off0000dc41.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDC41	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f453.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF453	17800 bytes
SHA-256: `eb064d6f785f0452b9fb371fd8ad14391bfdd790a65cb07a87df9ec17d1ecd12`
`font_02_sfnt_off00012264.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12264	10932 bytes
SHA-256: `3a6f7d1e111f887c881a9011cea471c85fa1fff7686d2da3197a907a43d0a9c5`

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