PDF malware analysis — malicious · ed6d043ffb989de9

MALICIOUS

PDF

88.2 KB Created: 2021-09-06 20:34:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 063dfa5cfe4a05b6e1a0eabf3ee18e8f SHA-1: f789fbc093390c71be2be6db01a8acc0123a0317 SHA-256: ed6d043ffb989de9472b68f4ce185346be6b7c92ff66112ca7b9a9951b011ffc

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external links, many pointing to compromised websites or link farms, suggesting a phishing or malware distribution attempt. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a pattern of directing users to potentially harmful external content. No scripts were extracted, but the overall structure and heuristics point towards a malicious intent to redirect users.

Machine Learning

Nyx PDF Classifier malicious score 0.9709

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://smidgel.ru/uplcv?utm_term=rudram+namakam+chamakam+lyrics+in+telugu+with+meaning+pdf PDF link annotation
- http://ukwoodrecycling.com/userfiles/files/3194206050.pdfIn PDF document text
- https://ceccarbotosani.ro/userfiles/file/vodefasudamaginibele.pdfIn PDF document text
- http://dcbestwings.com/uploads/files/39826427177.pdfIn PDF document text
- https://salvatoredivilio.it/userfiles/file/15025486728.pdfIn PDF document text
- http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/6pd5es1f9ihffjqrninobkbao1/40831536374.pdfIn PDF document text
- http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/16124b6a39c053---57926643641.pdfIn PDF document text
- http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611cc7fd99e26---6204095063.pdfIn PDF document text
- http://cokhiminhhien.com/media/ftp/file/nexinijeri.pdfIn PDF document text
- https://bbpartner.cz/userfiles/file/13980178542.pdfIn PDF document text
- https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/da9a87608bd5ff9535ded81f3e3e29cc/70424824507.pdfIn PDF document text
- http://suachuaspa.com/upload/images-content/files/xeloropokaneb.pdfIn PDF document text
- http://group-anons.ru/userfiles/files/68851836312.pdfIn PDF document text
- https://limpiezasinasel.com/userfiles/files/luzagokukinonu.pdfIn PDF document text
- https://viettrungson.com/media//Files/11924290967.pdfIn PDF document text
- https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/bb42b057bd95b586362be3877ca3a4b7/xuvizamutulanimadezajin.pdfIn PDF document text
- http://indianmailbox.com/assets/images/userfiles/files/solimefafej.pdfIn PDF document text
- https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/4fim9lb32mv1kqcborr6k5bh04/lefefanodowovereron.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987c9b6468d---dakimoruzukupa.pdfIn PDF document text
- http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/12309074596.pdfIn PDF document text
- http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2aa91d18eb---dolibojafikegejola.pdfIn PDF document text
- https://biocoils.com/img/file/meroxo.pdfIn PDF document text
- https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/915128a58aa62d062f0e35c35e6754ad/9777546426.pdfIn PDF document text
- https://soechi.com/userfiles/file/78188309803.pdfIn PDF document text
- http://olsztyntransportmedyczny.pl/userfiles/file/xubawoxiridov.pdfIn PDF document text
- http://betaempire.com/uploads/userfiles/file/file/vujasusenu.pdfIn PDF document text
- http://print-resource.co.uk/ckfinder/userfiles/files/zuzasejolobizomasovedike.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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c6e1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC6E1	16476 bytes
SHA-256: `169253f6b46037294454b0966dbaeb584fe89b39a995fc0accf1042e50050b3f`
`font_01_sfnt_off0000ddcf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDDCF	2128 bytes
SHA-256: `ea0838c56c771baac3e7294113a37a869da30c0923c5234740d3ad99157bc88d`
`font_02_sfnt_off0000e766.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE766	21996 bytes
SHA-256: `a6358457126f3b170e98ac7a325f1e90dce8a8c102be0d3fc2b56bc9128fb672`
`font_03_sfnt_off00011e89.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E89	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_04_sfnt_off000136a0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x136A0	11384 bytes
SHA-256: `b7c42e934cc6b63d706d07babff50b36662a0a85330aa9f734853e95ee45f426`

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