PDF malware analysis — malicious · 659e9666c2807ea3

MALICIOUS

PDF

78.9 KB Created: 2021-09-04 09:14:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 39501e3b3663b189f1ffea984f1f7731 SHA-1: 5109efb731bf9671f00b3a247a1bc8b12a19c369 SHA-256: 659e9666c2807ea36af5aeb8ce744a77f6f8b10bf68a916241fb0dbc051e13e1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as a link farm and a phishing trojan. The ML classifier and ClamAV detection strongly indicate malicious intent. The document contains numerous URLs, many of which point to compromised or disposable hosting, suggesting an attempt to lure users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

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://babamore.com/upload/ckfinder_temp/files/20210629190027.pdf In PDF document text
- http://masonhn.com/d/files/78634030461.pdfIn PDF document text
- http://abaj.cz/UserFiles/File/bidezapadines.pdfIn PDF document text
- http://mkbeauty.vn/luutru/files/furabifek.pdfIn PDF document text
- https://aykutemlak.com/upload/ckfinder/files/xinuxomerikorekufalulav.pdfIn PDF document text
- https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/fgru3gcpg7gsvmdl3hsr05toi7/lesexitizifiredenukiral.pdfIn PDF document text
- https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/7083e42492c69502c81e8fa69cd5a911/pukukosibozozedikap.pdfIn PDF document text
- http://aotwresort.org/ckfinder/userfiles/files/65437966561.pdfIn PDF document text
- http://www.mmalappeenranta.com/tiedostot/files/51898660957.pdfIn PDF document text
- https://veterinarycarefoundation.org/userfiles/file/pimevobivonuzakopezow.pdfIn PDF document text
- https://daxitrip.com/basefile/daxitripcom/files/44382577290.pdfIn PDF document text
- http://rafaelokazakov.com/file/7690226401.pdfIn PDF document text
- http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b700a0eea5c---37216921921.pdfIn PDF document text
- http://gajagotour.com/UserFiles/file/saleki.pdfIn PDF document text
- https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/5a81ae6d7b262010c4f839af26d386a7/feroxopesegasobebogega.pdfIn PDF document text
- https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/aac8f2dfaadd1b5e9aeffb59f8a36966/4148124178.pdfIn PDF document text
- https://newtech-utm.pl/userfiles/file/biridawomabasu.pdfIn PDF document text
- http://anthonyvienna.com/sites/default/files/file/pamoxe.pdfIn PDF document text
- http://scamps.biz/userfiles/file/83876645170.pdfIn PDF document text
- http://t-p-fortune.com/userfiles/file/92259089942.pdfIn PDF document text
- http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160794720a018c---tifeketimezaruvelisoxi.pdfIn PDF document text
- https://irepairplus.nl/app/webroot/files/userfiles/files/nilapotuniguno.pdfIn PDF document text
- http://bendhorseride.com/userfiles/file/gitiziritililanogokune.pdfIn PDF document text
- http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/24370579828.pdfIn PDF document text
- https://tch.lu/files/files/nekixibelijikobumadibuvop.pdfIn PDF document text
- https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/a2e3da5a26d9f4d03d32d3cac22e6178/76400728615.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=visualizing+data+ben+fry+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_off0000cd27.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCD27	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e539.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE539	17996 bytes
SHA-256: `0f0bec9b16a529092f6197f9c2fe9f6473f8ab95c4365072ab1901c9b065890d`
`font_02_sfnt_off00011430.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11430	10936 bytes
SHA-256: `31c65b4d8382c30ddae9dc8cd75fa36cca711b27ba506ba719574f87acd14664`

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