PDF malware analysis — malicious · c25c98356457c70b

MALICIOUS

PDF

77.6 KB Created: 2021-09-23 13:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 419b6a7d25d5087a99de7cd5f7458ce5 SHA-1: 361aceb095f2852c00b0dfce98d5e210be318979 SHA-256: c25c98356457c70b40c6ae2c280b68a9301e9df4959c7033d72989dbf2de1e1b

154 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 disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, but the primary attack pattern involves luring users to external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.5896

Heuristics 5

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
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=persona+4+miku PDF link annotation
- http://nakloboucku.cz/uploaded/file/17935858837.pdfIn PDF document text
- http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/jinalesusinenepupigo.pdfIn PDF document text
- http://saatgaamkansarasamaj.com/admin/uploads/files/88942314435.pdfIn PDF document text
- http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132ccbbd30f2---41078731882.pdfIn PDF document text
- http://elskup.pl/images/assets/file/paxuwaxe.pdfIn PDF document text
- http://architettodrabeni.it/userfiles/files/dolezerikikipomer.pdfIn PDF document text
- http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/67866645325.pdfIn PDF document text
- http://geofer.eu/userfiles/files/pozawagut.pdfIn PDF document text
- http://csptech.net/admin/userfiles/file/fenidorazewerisewoso.pdfIn PDF document text
- https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614b88c2a3c9d---10551785782.pdfIn PDF document text
- http://agriturismoilnoceto.com/userfiles/files/7326586227.pdfIn PDF document text
- http://www.evisiontiendaonline.com/ckfinder/userfiles/files/39577536602.pdfIn PDF document text
- http://salsainkonstanz.de/media/files/danotinejijebumo.pdfIn PDF document text
- http://chatfieldfarms101.com/userimages/taxakoxadubam.pdfIn PDF document text
- https://saikekanglun.com/filespath/files/20210921111718.pdfIn PDF document text
- http://levakov132.ru/userfiles/file/27028605944.pdfIn PDF document text
- https://damsindia.org/admin/uploads/file/duvimodotagokokosoxo.pdfIn PDF document text
- https://skillmapmagazine.com/ckfinder/userfiles/files/78105280816.pdfIn PDF document text
- https://dienhoanghean.com/upload/ck/files/36806397620.pdfIn PDF document text
- http://lianbang123.com/uploads/files/202109031554439400.pdfIn PDF document text
- https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/7b86cf7bf7396fc0913c7d0f5464c7a5/80629130752.pdfIn PDF document text
- https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1613551f980279---mipadefezukofatuxoditep.pdfIn PDF document text
- http://gbfrjournal.org/pds/userfiles/files/zepodoneseziremobolofixu.pdfIn PDF document text
- https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16145a1b91d1d5---19422484749.pdfIn PDF document text
- https://senegal4d.com/contents/files/39299359048.pdfIn PDF document text
- https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/f776a370e21ff22e41f2ee008cd75cd1/43748957765.pdfIn PDF document text
- http://pwharrison.com/userfiles/file/pujudoxomam.pdfIn 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_off0000d845.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD845	18816 bytes
SHA-256: `88b1776ea16383ac40b0253da07dd94bf99759e1209358974fbe106d927c68fa`
`font_01_sfnt_off0001095f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1095F	10396 bytes
SHA-256: `f2fa7d21ac22cc188d114ab6adc988c0c25443ac64a4c7d5407bf479308ecaa0`
`font_02_sfnt_off000120f4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x120F4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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