PDF malware analysis — malicious · bbf904ed1c84eb4f

MALICIOUS

PDF

105.2 KB Created: 2021-06-25 21:04:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 5672ed030d0636f10333bf9896f128ed SHA-1: 83279bd3a6410d3e5966060d3511e784f87f9f4c SHA-256: bbf904ed1c84eb4f804613a26dd71d401bb64cddb8f676a4ec7d56b770c63304

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The file is identified as malicious by ML classifiers and ClamAV. It contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised CMS uploads or disposable hosting, indicating an attempt to obscure the ultimate destination. The primary goal appears to be directing users to potentially malicious content via these links.

Machine Learning

Nyx PDF Classifier malicious score 0.9874

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://broadmoor80.com/clients/866172/File/8263880736.pdf In PDF document text
- http://haciogullari.com/depo/sayfaresim/file/wadopamodep.pdfIn PDF document text
- https://willmarareachamber.com/ckfinder/userfiles/files/5003880229.pdfIn PDF document text
- https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/7hp9en37oh6lar4lsjg0uh6ssg/vuwidekutumunobidilonog.pdfIn PDF document text
- http://ouhkpthaa.org/userfiles/7886844784.pdfIn PDF document text
- https://store-connector.com/_upload_bilder/_filemanager/file/79725322732.pdfIn PDF document text
- http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f17ba1cf9f---sorisitimizovenotapolegak.pdfIn PDF document text
- http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6aaa38024e---18950844047.pdfIn PDF document text
- http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2fb540c92b---38908196567.pdfIn PDF document text
- http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160b2cb39e27f6---jorinokupebo.pdfIn PDF document text
- https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/dp7je71l3o21tburc7gtf2r6tg/viboresarovizutasuluzor.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d4ad3cb8f---kefukozeponogudodub.pdfIn PDF document text
- http://freehajjandumrah.com/admin/admin/uploadfiles/file/40804194321.pdfIn PDF document text
- https://rosycaffe.com/file/vuzudamogezepiwezu.pdfIn PDF document text
- https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160770097a912d---bozezevop.pdfIn PDF document text
- https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/u7na6jh95t8t2lmt8rpven4u91/44107707914.pdfIn PDF document text
- https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdef30f1dbe---5132038156.pdfIn PDF document text
- https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078aeb5c7fc9---fudabolaluzo.pdfIn PDF document text
- http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c0cdc61759f---nelubamug.pdfIn PDF document text
- https://armagedonspedycja.pl/files/file/79994483327.pdfIn PDF document text
- http://kinel-hunter.ru/upfiles/file/48132707330.pdfIn PDF document text
- https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/mc4ejov9q54tr8biuq1h549lfq/jegawizixo.pdfIn PDF document text
- https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/e147874c5713d757e6275974fd9f0d3e/87612643817.pdfIn PDF document text
- http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b3fd423b1e5---bejowijepi.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=dominican+amber+fossils+and+archeologyPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00011d78.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11D78	16064 bytes
SHA-256: `a013ce2342554bbd70a9f85285a6053b67e9b25eaba0dd22223cc179b1b1ea16`
`font_01_sfnt_off00013288.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13288	18536 bytes
SHA-256: `b9685f9381f16ec2f0be0fed7ede9de6498ddea897aebedbf4d4acdeb209babf`
`font_02_sfnt_off0001638e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1638E	11080 bytes
SHA-256: `25b0b920eb84c6044b83dc9810abf82e9473259de2bcf141d7e5bf949bd5e3c3`
`font_03_sfnt_off00017cf4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17CF4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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