PDF malware analysis — malicious · 5e669183b721fb4a

MALICIOUS

PDF

79.0 KB Created: 2021-07-09 05:34:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: e88177a59871edcc00bdd24b7254bd7d SHA-1: 868eba58ebfdfc60ffb75c54dfb3544becf91efb SHA-256: 5e669183b721fb4aae969f434b21d9b781ef672c73b38ea1f68837a0ca4f94f6

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the nature of the links indicate a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9833

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://cructi.ru/uplcv?utm_term=harry+potter+123movies+free PDF link annotation
- https://alnahamgroup.com/userfiles/file/12609276641.pdfIn PDF document text
- http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c4337d8f8a2---95829357005.pdfIn PDF document text
- http://dermalab.pl/userfiles/file/delejimufuburubufinu.pdfIn PDF document text
- https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/03a220e9f472567fbdd368871df43149/15788048193.pdfIn PDF document text
- https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/1quta9hsal4j69gmgng46j2kvb/22268293727.pdfIn PDF document text
- http://thegibbsfamilyreunion.com/clients/d/d9/d929505c7faf6263097cc97620c39d65/File/pijumaj.pdfIn PDF document text
- http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c962d8e3a2---dubifozudim.pdfIn PDF document text
- https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/8f5ht62dg048b63ufpoao529p2/69826898942.pdfIn PDF document text
- https://bamfieldrental.com/userfiles/file/48843035047.pdfIn PDF document text
- http://apvn.info/userfiles/file/87439743902.pdfIn PDF document text
- https://mobilieroccasion.fr/uploads/file/xolopujojavivepane.pdfIn PDF document text
- https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/55debbda6ea2ce9024f414a7948cef5b/9372596231.pdfIn PDF document text
- http://archinfo.ru/uploads/file/9957396781.pdfIn PDF document text
- http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16082b451e45b0---56781211897.pdfIn PDF document text
- http://jullien38.com/ressource/site-image/files/fowugikupitu.pdfIn PDF document text
- https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/1c759a82cc199769dcb31fae262944ad/15901768487.pdfIn PDF document text
- http://sintellect.ru/Repository/file/17244622746.pdfIn PDF document text
- https://celebicatering.com/upload/ckfinder/files/1396512287.pdfIn PDF document text
- http://amexeuro.com/an3_Uploads/file/58313825919.pdfIn PDF document text
- https://bursakaynak.net/userfiles/file/logijuvaz.pdfIn PDF document text
- http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/rb4d4b3v1l9g46o6jqin9ma1m3/labekinatodaruwadoriraxuv.pdfIn PDF document text
- https://drivetripper.com/userfiles2020/files/35030538913.pdfIn PDF document text
- http://montgomery71.com/clients/34132/File/xugibek.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0ebb53c85---38716930167.pdfIn PDF document text
- https://primer-spb.ru/files/files/xudidutulevomuvogise.pdfIn PDF document text
- http://thuephotocopytaihanoi.com/upload/files/97998194405.pdfIn PDF document text
- http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/caaaac2ea1306498edd16816b900f4d4/93846062756.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_off0000d08a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD08A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e8a1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8A1	10884 bytes
SHA-256: `cba1247d4e6b14208efc65814640f731f7a6b2d74b631cef93698d159a5939b8`
`font_02_sfnt_off000101fb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x101FB	17208 bytes
SHA-256: `1ea47710f5559dd28ca36b2f74d0b439774556ec19edc93da1492ffe618966ba`

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