PDF malware analysis — malicious · d29c58714f68f2d4

MALICIOUS

PDF

77.3 KB Created: 2021-09-09 13:59:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: 883abb4331778062a82002621821cb5e SHA-1: 57ecdc0eca9bcdbf67c9a793d08f42d4ad41deb6 SHA-256: d29c58714f68f2d4ca4fb20366c55aba218e3aa6310263268a0c5766818399e9

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external URLs, including one with a 'QR code scanner' UTM term, suggests a phishing or malware distribution lure. The heuristic 'SE_QR_LURE' further supports the idea that the document is designed to trick users into interacting with a QR code, likely leading them to one of the embedded malicious URLs.

Machine Learning

Nyx PDF Classifier malicious score 0.9948

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
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.
QR-code redirect lure medium SE_QR_LURE

Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
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://coretry.ru/uplcv?utm_term=online+image+qr+code+scanner PDF link annotation
- http://indagosrl.it/userfiles/files/jisutoxubewowozekedizosen.pdfIn PDF document text
- http://hsi-international.com/ckfinder/userfiles/files/24845714941.pdfIn PDF document text
- https://digicpictures.com/downloads/xegumijebamerexezojulix.pdfIn PDF document text
- https://durgabas.coop.np/ckfinder/userfiles/files/japojodofodoj.pdfIn PDF document text
- http://madmojo.com/fckupload/file/16234849621.pdfIn PDF document text
- http://budka39.ru/files/ledofufixarotelepajokiwi.pdfIn PDF document text
- https://beruanglucu.com/contents/files/povafodox.pdfIn PDF document text
- https://ochronaskory.pl/pliki_user/File/gulid.pdfIn PDF document text
- http://kaitosushisb.com/uploads/files/nodibalevakimazuv.pdfIn PDF document text
- http://podushka.by/files/files/13520094666.pdfIn PDF document text
- http://productinfo.in/konadnew/userfiles/file/fojokasigarejineziz.pdfIn PDF document text
- http://orikon.net/Images_upload/files/50461118067.pdfIn PDF document text
- http://mediedil.eu/userfiles/files/4225255610.pdfIn PDF document text
- https://chatham-ebenezer.ckdomain.com/uploads/userfiles/files/bajotawaxabokarij.pdfIn PDF document text
- http://mavelikaradiocese.org/rapha/ckfinder/userfiles/files/96417699762.pdfIn PDF document text
- http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/16139b46ebcfcf---62832249953.pdfIn PDF document text
- https://prana.video/wp-content/plugins/super-forms/uploads/php/files/u5q1jhrdk8nnslmuu8860cb4fk/36620221980.pdfIn PDF document text
- http://chemtron-vostok.ru/media/file/duwuzakirevamavud.pdfIn PDF document text
- https://insp.biz/img/file/73816924280.pdfIn PDF document text
- http://www.kizkulesikizogrenciyurdu.com/public/ckfinderuploads/files/dixokododipurisaja.pdfIn PDF document text
- http://airelimpio.mx/img/editor/file/95969498301.pdfIn PDF document text
- https://congchung7.com/upload/file/xoniwoladine.pdfIn PDF document text
- https://fcksa.com/ckfinder/userfiles/files/sisem.pdfIn PDF document text
- http://pytextiles.com/userfiles/file/4453850903.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_off0000c888.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC888	10788 bytes
SHA-256: `5ed03966b431a18c0b4957c7d679fe3082c39c73418838dd7df3880762d2bdcb`
`font_01_sfnt_off0000e0c2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE0C2	18340 bytes
SHA-256: `ce2eb04a0fac13d1546990ae8e27e68bb7a2506246732416b34c55536876471e`
`font_02_sfnt_off00010fb7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10FB7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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