PDF malware analysis — malicious · ddf4cc6b4eaf6a43

MALICIOUS

PDF

81.5 KB Created: 2021-09-09 20:47:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 0fd3b67da4b8eecd1a616b583b656dcc SHA-1: f2f4d60a58dcd79bf71e2ebc04cc0c355eebc114 SHA-256: ddf4cc6b4eaf6a4324bf95ef74b1fc877256146786cefc8f76d9eec3e1586b60

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The critical heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's intent to trick users into revealing sensitive recovery secrets or private keys. The presence of numerous external URLs, many linked to disposable hosting and employing UTM parameters, suggests a phishing or credential harvesting campaign. Although no scripts were explicitly extracted, the PDF format and the nature of the lure are consistent with phishing techniques often delivered via email attachments.

Machine Learning

Nyx PDF Classifier malicious score 0.9977

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE

Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
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://oniceh.ru/uplcv?utm_term=kotlin+get+gps+location PDF link annotation
- https://smsenerji.com/resimler/files/17176791111.pdfIn PDF document text
- https://landtop.com/filespath/files/20210909150101.pdfIn PDF document text
- http://caythuocdangian.net/images/files/polenuxovagifimo.pdfIn PDF document text
- http://wksx.top/images/userfiles/file/91762871518.pdfIn PDF document text
- https://xn--interpeas-r6a.es/upload/files/53494895984.pdfIn PDF document text
- https://cultureresortpokhara.com/assets/userfiles/files/87516618386.pdfIn PDF document text
- http://mobilenmr.com/files/files/mubupavegiliz.pdfIn PDF document text
- http://teenmag.cz/userfiles/file/13008801827.pdfIn PDF document text
- http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/161392f2213669---tatavujozekolejet.pdfIn PDF document text
- http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/39200010219.pdfIn PDF document text
- http://auburn-companies.com/userfiles/files/zatiguvarolisawibide.pdfIn PDF document text
- http://medical-1669.com/userfiles/files/83804666545.pdfIn PDF document text
- http://weilandvloeren.nl/fckimages/ledukositujenevil.pdfIn PDF document text
- https://aluminiosarla.com/userfiles_arla/files/koxokavumat.pdfIn PDF document text
- http://ordinate-ltd.com/file_media/file_image/file/gavin.pdfIn PDF document text
- http://chrisdepanneservices.fr/Sites/cds/files/55504825773.pdfIn PDF document text
- http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131cddb748f6---71818872553.pdfIn PDF document text
- https://honkakuji.jp/honkakuji/images/ckfinder/files/nerifavowizovumite.pdfIn PDF document text
- http://koutingchina.com/upload/files/60742056749.pdfIn PDF document text
- http://autoset66.ru/admin/ckfinder/userfiles/files/xozilagerubevezetivex.pdfIn PDF document text
- http://apcmagon.com/userfiles/13931642975.pdfIn PDF document text
- http://xn--or3bi2da319p.com/upload/fckeditor/file/27274388915.pdfIn PDF document text
- http://oresteruggiero.com/userfiles/files/mepuwafi.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_off0000db32.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB32	17272 bytes
SHA-256: `63e697cbe7e5c69c5399bda06b0ebfdbef7ed7ba1fe7cf8b1ef556f1fc2824d9`
`font_01_sfnt_off0001088a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1088A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000120a1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x120A1	10440 bytes
SHA-256: `cb0d847d9dc63ef8cf3bc0ebd7aed5c83108e197e77c4b51d7e1332f3816ffde`

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