PDF malware analysis — malicious · eea667a072688f6c

MALICIOUS

PDF

86.2 KB Created: 2021-09-17 23:19:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: a48a31332ff5fbcebc732429aac5a3c7 SHA-1: 34b03abf4882f0e7f3fc181e315c126bd84b808e SHA-256: eea667a072688f6ca89a0f37bfea149b084b7638efd074cdc80fe5659c3f834d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by a machine learning classifier and ClamAV as malicious, with heuristics indicating it functions as a link farm. Several extracted URLs point to compromised websites or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of multiple external URIs and a link farm structure strongly indicates a phishing or malware distribution vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9952

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://pixomot.ru/uplcv?utm_term=zawgyi+tai+keyboard+apk PDF link annotation
- https://madame-tina.com/ckfinder/userfiles/files/kisesanisimudagodorof.pdfIn PDF document text
- https://maintogelonline.bet/contents/files/45256793783.pdfIn PDF document text
- http://alptw.com/images/files/vaxutedusuvezowotasuminor.pdfIn PDF document text
- http://herningbadintra.dk/app/webroot/upload/files/21173018771.pdfIn PDF document text
- http://4grd.com/cmsimages/file/79249047367.pdfIn PDF document text
- http://homeloanz.net/images/e/file/wowololadizogotamevog.pdfIn PDF document text
- http://logicparcel.net/uploadsEditorfile/kunigibuweropun.pdfIn PDF document text
- https://hamzakocakoglu.com/userfiles/file/11997485976.pdfIn PDF document text
- https://tefen67.com/userfiles/files/lazedejonerowidemedij.pdfIn PDF document text
- https://grandiosieventinuziali.it/filesUploads/file/ximerenebitelasovar.pdfIn PDF document text
- http://boxerdapolenta.com/cmsimple/images/file/dizujilanemupusewew.pdfIn PDF document text
- http://kvarkeno56.ru/userfiles/file/pajagopinakivovexuf.pdfIn PDF document text
- http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/161421aaa3dd08---ladajejit.pdfIn PDF document text
- http://karat-dobremiasto.pl/userfiles/file/lukuganisafuwij.pdfIn PDF document text
- http://bestpokeya.com/uploads/files/dobenodawawoz.pdfIn PDF document text
- https://helicopterleasingservices.com/userfiles/files/tujowizatilosa.pdfIn PDF document text
- http://xn--oy2b19v1mb1yi.com/userfiles/file/sunigifekozadunojujaku.pdfIn PDF document text
- http://steinbach.casawell.tw/userfiles/file/71901459468.pdfIn PDF document text
- http://beautifulmoda.com/userfiles/files/pexeliri.pdfIn PDF document text
- http://pobierzplik.pl/uploads/files/12599331883.pdfIn PDF document text
- https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/ddfee1baa0cad06f2e9af23c637c9671/wasadununira.pdfIn PDF document text
- http://jungvassar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/worubuj.pdfIn PDF document text
- http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130cd57022b0---6523570830.pdfIn PDF document text
- http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/161434e51d1087---gipedapapoliselaluraxano.pdfIn PDF document text
- https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143933f47dab---56539046869.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000cb98.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCB98	16164 bytes
SHA-256: `a0f26d9ec2bc0bbc84dfb8c1a224a49f7f70479ac92e21d726acd811d43f3bd1`
`font_01_sfnt_off0000e139.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE139	22792 bytes
SHA-256: `df1b4818de300a55fc1196d762571e7045b49fa341b65d92e19b354b88d70e99`
`font_02_sfnt_off00011a87.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A87	10644 bytes
SHA-256: `8f3b531aca591c153096755500d238348cf8bdaaf05774aeb07bd375a3cd3342`
`font_03_sfnt_off000132b0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x132B0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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