PDF malware analysis — malicious · ecde62264342c70f

MALICIOUS

PDF

75.6 KB Created: 2021-09-24 02:20:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 4f586f8d650c2c840fb86eedafb150a6 SHA-1: 579984f99abf7226b1af7705b4620141684f0461 SHA-256: ecde62264342c70ff8d00db2a2f48c96607260d4495fd74713366a6a9669df96

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. It contains numerous embedded URLs pointing to suspicious domains, suggesting it functions as a link farm or phishing lure. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically identifies the document's structure as a link farm on disposable hosting, reinforcing the phishing or malware distribution attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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
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://pistant.ru/uplcv?utm_term=moy+3+mod+apk PDF link annotation
- http://cathugo.de/res/wysiwyg/file/1848028503.pdfIn PDF document text
- http://www.cavice.fi/tiedostot/files/fabemosazi.pdfIn PDF document text
- https://www.peltonfell.org.uk/ckfinder/userfiles/files/maluwava.pdfIn PDF document text
- http://pate4me.com/userfiles/file/sedubomivelor.pdfIn PDF document text
- https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16145d3791ac2b---rakoxiro.pdfIn PDF document text
- http://matrix-corporation.com/upfiles/editor/files/25560343013.pdfIn PDF document text
- https://hagakure.by/upload/editor/files/96085592295.pdfIn PDF document text
- http://gediklimakinahidrolik.com/resimler/files/51928036076.pdfIn PDF document text
- http://eg-connect.com/php_codes/Scott/VieauAssociates/code/userfiles/file/pagadiven.pdfIn PDF document text
- http://lsbwg.com/ckfinder/userfiles/files/20210909/0903258405.pdfIn PDF document text
- https://goldfieldssanddrags.com.au/ckfinder/userfiles/files/45714986384.pdfIn PDF document text
- http://www.pattyn360.com/upload/forum/files/31111211376.pdfIn PDF document text
- http://datev.hu/ckfinder/userfiles/files/natazudafiduxibi.pdfIn PDF document text
- https://sunnyrosesschool.com/userfiles/file/3668555589.pdfIn PDF document text
- https://laptoptranganh.com/data/dulieu/files/borenapewezoj.pdfIn PDF document text
- http://www.radio-kum.si/data/files/kezopajibikuzon.pdfIn PDF document text
- http://mamaskitchenorder.com/uploads/files/duxepinefuxek.pdfIn PDF document text
- http://cck-brno.cz/ckfinder/userfiles/files/juzulesutuzudarimojibu.pdfIn PDF document text
- http://gaziogluenerji.com/images_upload/files/bedojikomilabowuf.pdfIn PDF document text
- http://levant-tekstil.com/other_files/File/66322014631.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_off0000bdf6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBDF6	20084 bytes
SHA-256: `30497540d1862544a402e9a2ac2d9dcc0c3cb905914066bb1a6e06005f84a95e`
`font_01_sfnt_off0000f29c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF29C	10184 bytes
SHA-256: `e5081ba6d606d9933fea38bfd99a68287a8f7e05b1c03c6e057d0066de94279f`
`font_02_sfnt_off00010974.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10974	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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