PDF malware analysis — malicious · 30fc779b77ef9c7d

MALICIOUS

PDF

78.8 KB Created: 2021-09-11 08:34:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: d27e84676db59666deb35451dfe39b86 SHA-1: 220a8506bff47c3ca08f376c2a0f3b19ad3a4de3 SHA-256: 30fc779b77ef9c7d58d2c1cc13da28555ea0faedc6d09a3c8a0b72c79d59f8d0

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to potentially malicious content, disguised as downloadable files. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade initial gateway scanning. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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://irlanc.ru/uplcv?utm_term=cara+buka+file+rar+di+hp+android PDF link annotation
- http://emirates-offshore.com/uploads/image/file/faxuru.pdfIn PDF document text
- http://yournamebadges.com/withyourdog/cms_uploads/file/guxanonikone.pdfIn PDF document text
- https://yptea.com/data/fckeditor/files/fipuxomipovanolukukoxome.pdfIn PDF document text
- http://52fotki.ru/ckfinder/userfiles/files/bujujapikuzazafogozulad.pdfIn PDF document text
- http://pasaru.com/upload/files/zojijorefar.pdfIn PDF document text
- https://www.thic.net/plugin/ce1/ckfinder/userfiles/files/gobejuvaputir.pdfIn PDF document text
- http://perevodvnegiloifond.ru/pict/file/zomogin.pdfIn PDF document text
- https://vkgnassociates.com/dayafter/uploadimages/newsimages/file/7465527807.pdfIn PDF document text
- https://cuacuonbentre.com/upload/files/bofewewana.pdfIn PDF document text
- https://unitedpetexpress.unitedreloth.com/ckfinder/userfiles/files/kirubi.pdfIn PDF document text
- https://alwillislifecenter.org/ckfinder/userfiles/files/41341834172.pdfIn PDF document text
- http://fapannimario.it/userfiles/files/vedagunaruluw.pdfIn PDF document text
- https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/e75a39b65d8605c13ed30d3f0b3bdf4c/fagudiguf.pdfIn PDF document text
- http://seritour.com/rsm/files/manuxewotafodozosisoki.pdfIn PDF document text
- https://jerseyshorepirates.com/userfiles/files/nilosikapesasaduje.pdfIn PDF document text
- http://epmachine.ru/d/files/vixizivikogoj.pdfIn PDF document text
- http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/161362edbbc99e---19768288427.pdfIn PDF document text
- http://www.rupankar.com/fckimages/file/80704286611.pdfIn PDF document text
- https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139d0ef4e494---vumoboton.pdfIn PDF document text
- http://nationalcoopadvisors.com/userfiles/files/86425789262.pdfIn PDF document text
- http://studiogiamberardino.it/userfiles/files/xoruguwubafomusa.pdfIn PDF document text
- https://seeandhearbetter.ie/img/shop/contents/19662017931.pdfIn PDF document text
- https://vetregistr.com/ckfinder/userfiles/files/2878248625.pdfIn PDF document text
- http://konikanarrowfab.com/ckfinder/userfiles/files/sakok.pdfIn PDF document text
- https://robertbah.si/files/file/gigunafesivadirakuwuda.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_off0000d088.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD088	17288 bytes
SHA-256: `62457985a417af13e323f885de7c5fd74b73e813c3f50f7b8758ee417adf2957`
`font_01_sfnt_off0000fdb6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFDB6	10692 bytes
SHA-256: `bdfdc6750b797b6562f848cf32cb3b7531737862376ef761c7e8714bce517ca2`
`font_02_sfnt_off000115e0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x115E0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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