PDF malware analysis — malicious · 10c6a2e6f750e052

MALICIOUS

PDF

73.8 KB Created: 2021-09-05 06:04:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 6669310064b29bcb84d7ec3946e21b06 SHA-1: d3f1733b59fd1ebb1b2deff40cc2160460c703fc SHA-256: 10c6a2e6f750e052151abe0dae0680fb7861e78b12b25b3336efc493a9ca1893

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites or link farms. Heuristics indicate a link farm strategy on disposable hosting and compromised CMS uploads, suggesting an attempt to lure users to malicious sites. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9908

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://archism.ru/uplcv?utm_term=sanyo+crt+tv+service+manual PDF link annotation
- https://lenaoyunlar.com/calisma2/files/uploads/99957097561.pdfIn PDF document text
- https://nikosdimos.gr/userfiles/file/gamorumepojadotike.pdfIn PDF document text
- http://avstralianature.ru/ckfinder/userfiles/files/64086150721.pdfIn PDF document text
- http://nazycakes.com/userfiles/file/98972254911.pdfIn PDF document text
- https://e-tta.com/app/webroot/userfiles/files/17271321431.pdfIn PDF document text
- http://xn--66-6kc8bfmkmjd.xn--p1ai/admin/ckfinder/userfiles/files/vilonuxivuwelaxinalavof.pdfIn PDF document text
- http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c346b862fb---32328685758.pdfIn PDF document text
- http://dharmapuridiocese.com/svnprojects/DHD/Source/images/files/kunesig.pdfIn PDF document text
- http://www.radeton-cz.vasestranky.cz/ckfinder/userfiles/files/gututusogawipenuvava.pdfIn PDF document text
- https://equalitas.es/userfiles/file/dunuxesubofelodonag.pdfIn PDF document text
- http://grandp.ru/userfiles/file/nevavebava.pdfIn PDF document text
- https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b988bbbf8dd---feluganipufafub.pdfIn PDF document text
- https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/0b37e546d7b9cf52bced15e0415b661c/kosogawuveduwo.pdfIn PDF document text
- https://gulyaskantin.hu/uploads/frontend/files/46489272569.pdfIn PDF document text
- https://nestuby.com/userfiles/file/13272961978.pdfIn PDF document text
- http://capitolmetrophysicaltherapy.com/userfiles/file/manebofe.pdfIn PDF document text
- http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/tjaqsfe808ucm0tmo5jh72js20/lijibavugesawu.pdfIn PDF document text
- https://vibangthuaphatlai.net/uploads/files/konipumowa.pdfIn PDF document text
- https://led7.ru/file/dodik.pdfIn PDF document text
- https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/9972e04ed4b1cff4cac1742b86a840ca/65978598804.pdfIn PDF document text
- http://strefa-fitness.pl//fckeditor/editor/filemanager/connectors/phpplikifile/78901321451.pdfIn PDF document text
- http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb1da5a4b6---33856718235.pdfIn PDF document text
- https://aprilboya.com/userfiles/file/vojelakizixenoweze.pdfIn PDF document text
- http://thuduchouse.vn/pics/file/bixamizelumataziwa.pdfIn PDF document text
- https://atphp.ch/userfiles/file/98581221932.pdfIn PDF document text
- http://drapikowski.pl/uploaded/fck_files/file/rimemejelagivekaxusedilu.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000bf83.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBF83	10744 bytes
SHA-256: `991f737ffd0f8e1d65cb9a2c21c79572c568c8b8eb147654ca07f0545084154e`
`font_01_sfnt_off0000d840.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD840	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f052.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF052	15996 bytes
SHA-256: `051c304130c6ce1ff1ceb7d67b61743f14e38fc5747f870b7c3dd189a6e7dcec`

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