PDF malware analysis — malicious · a441034dfe02b0f5

MALICIOUS

PDF

82.3 KB Created: 2021-09-14 18:21:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 1c26f3712ce031512f0725a870d02f15 SHA-1: 1fe427390ae72f2e7580d0eb34be4635b4b7c2af SHA-256: a441034dfe02b0f579f71ed7435fdbfc581bdfcacafa9f0d9a8b1b5491a58db6

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, with a high ML classifier score and ClamAV detection indicating malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host many links on disposable domains, likely to direct users to phishing or malware sites. The embedded JavaScript is a common method for exploiting PDF vulnerabilities or initiating further malicious actions.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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 http://dade666.com/userfiles/202109file/2021090815031170554.pdf In PDF document text
- https://partroyfuneralhome.com/partroy/assets/file/37102714539.pdfIn PDF document text
- http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/utse121if16t7nenm4abj6d0q1/lomoxidaxupizi.pdfIn PDF document text
- http://bagodilovaspark.hu/userfiles/file/17312654379.pdfIn PDF document text
- http://dade666.com/userfiles/202109file/2021090300260270554.pdfIn PDF document text
- http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/dorakepadisoposuminu.pdfIn PDF document text
- http://www.alfapilates.pl/upload/file/pemenoposugazepufof.pdfIn PDF document text
- http://sunway.me/uploads/file/1010251569.pdfIn PDF document text
- https://speculatio.in/ci/userfiles/files/2309272589.pdfIn PDF document text
- http://citysoupsbellevue.com/uploads/files/dumumibovab.pdfIn PDF document text
- https://kingdomdatesuae.com/userfiles/files/denisozikidowixu.pdfIn PDF document text
- https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/vofipodisekufige.pdfIn PDF document text
- http://kxqcgs.com/filespath/files/20210901230110.pdfIn PDF document text
- http://hepiran.com/cache/fck_files/file/fezunegapozikodomezebizuw.pdfIn PDF document text
- https://petandpuppies.com/userfiles/file/tuvenux.pdfIn PDF document text
- http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613a4ee009514---gexadapobewuxidegutig.pdfIn PDF document text
- https://easternresources.net/ckfinder/userfiles/files/56883684387.pdfIn PDF document text
- http://pereplanirovkaoblast.ru/pict/file/jevimerebopufofiwugisobuv.pdfIn PDF document text
- http://iuf.kr/pds_down/files/javiraruve.pdfIn PDF document text
- http://daisytalavera.com/userfiles/files/wetosamogiri.pdfIn PDF document text
- http://rayhovietnam.vn/upload/files/77328492886.pdfIn PDF document text
- https://sanaspinler.net/calisma2/files/uploads/35189634681.pdfIn PDF document text
- http://supermarketdv.ru/files/file/suwukapiratetijatur.pdfIn PDF document text
- https://aodaixuan.vn/app/webroot/upload/image/files/93417020922.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=damon+ps2+free+versionPDF link annotation
- 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_off0000dcdc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDCDC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f4f3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4F3	10560 bytes
SHA-256: `29af4840ac4e8f0624bd5908737b275a819b086b99730ce2ce4e408baebf1e08`
`font_02_sfnt_off00010d0e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D0E	18024 bytes
SHA-256: `b68e8ac7683a1de6cf9e83546ad8651fe8e775ea5305a3089b6b2c7f836c4191`

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