PDF malware analysis — malicious · 6987e0221e38ac0d

MALICIOUS

PDF

85.5 KB Created: 2021-09-02 18:11:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: c7850ac8c3b916b07726bf01d0609d83 SHA-1: 4916f738cde58cacbe0908eaa1756cd4e4400bdb SHA-256: 6987e0221e38ac0d0657299d612b55cbbe1f2efe8c2ded1ef344e25b395353c3

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting it's used to distribute phishing content or further malware. The presence of multiple external URIs and link farm heuristics strongly supports this attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9762

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://crysiq.ru/uplcv?utm_term=msa+2050+datasheet+pdf PDF link annotation
- https://mimpiindah2.com/contents//files/92965083388.pdfIn PDF document text
- http://stevis.cz/files/file/xemexutisipezuk.pdfIn PDF document text
- https://www.agencesramos.com/ckfinder/userfiles/files/demegifubewetetaj.pdfIn PDF document text
- http://rogersdesignhouse.com/uploads/files/8116681518.pdfIn PDF document text
- https://wintechindia.in/ckfinder/userfiles/files/tusomimikuto.pdfIn PDF document text
- https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/kvqu5t4bcj383mk04bkdmbn6nr/60747502168.pdfIn PDF document text
- https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/4a4b478feec4840a92440eb06c599997/firenuverifekorot.pdfIn PDF document text
- http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/menopozodalufelivikus.pdfIn PDF document text
- https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160ae090faa615---wosabo.pdfIn PDF document text
- http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/eae97896c9b4d2a2273c9814157b30a5/xidig.pdfIn PDF document text
- https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/95663f3a26f8f65561932e56492ecfa0/66345812659.pdfIn PDF document text
- http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/93c9b3b42a2d75e61a0c05167a6406c5/6554434865.pdfIn PDF document text
- https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16082c2e86939a---78815686182.pdfIn PDF document text
- https://coopinproject.eu/ckfinder/userfiles/files/8706640985.pdfIn PDF document text
- https://chptravel.ir/data/file/kifubopug.pdfIn PDF document text
- http://jr-bang.com/uploadfiles/20210627035937.pdfIn PDF document text
- http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3cdc3a8a4---fufedibupatufepidesuse.pdfIn PDF document text
- http://rgjbreunion.com/clients/6/69/6950e03db8b1ea894755b369f0a03c31/File/sugufupif.pdfIn PDF document text
- http://hobbstownis100.com/clients/6/66/66141d04a4341350d76ae3a38785cb5a/File/sugekafitatoti.pdfIn PDF document text
- https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/82f21a871343b97a8c63419eccd51c3d/59396560774.pdfIn PDF document text
- https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/c5qdou4o4j6fo7k5ef9dq079ok/sevaginatoxebagetizufi.pdfIn PDF document text
- https://hlj-vibration.com/uploads/image/20210810/files/20210810102158.pdfIn PDF document text
- http://lica-mpt.it/userfiles/files/19038385750.pdfIn PDF document text
- https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97b4af2f38---sekuteniwoxevepoxuk.pdfIn PDF document text
- http://ewtch.com/upload/files/rujupivexawowasege.pdfIn PDF document text
- http://domgr11.ru/uploads/files/59578621398.pdfIn PDF document text
- https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/6a93099b0ed1cefd536088de668da1f0/13199477511.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_off0000cd11.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCD11	20212 bytes
SHA-256: `6164097999360f87688c7470789e8469b0d8ea290ee1a702a913cf48984b5b01`
`font_01_sfnt_off000101a6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x101A6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000119b7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x119B7	16196 bytes
SHA-256: `e9f280c96b9332c207e359a208f727c71382a4e2b38a36525aa4eb526e71a763`
`font_03_sfnt_off00012f82.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12F82	10504 bytes
SHA-256: `aa46963cad92b9e1b30d529875edffa0c0a34a78a1a0e7b9c1682564d9934680`

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