PDF malware analysis — malicious · fa5e5836703c136d

MALICIOUS

PDF

83.1 KB Created: 2021-09-22 09:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: d466c1386277ba5cf1953518d0167bc7 SHA-1: 0df3b62ccb57c196da8ea23d3aeef17091528582 SHA-256: fa5e5836703c136df36767418a9d60cf173bfeacb4825637d5c49967db0da6f1

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the structure and embedded links are consistent with a malicious PDF designed to redirect users to harmful content.

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
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://pistant.ru/uplcv?utm_term=gtv+live+cricket+today PDF link annotation
- http://mecaniquekd.ca/upload/file/xixidajokewukamonotitupar.pdfIn PDF document text
- https://olboihorgaszto.hu/editor_up2/jazasawirowiwajusigazatox.pdfIn PDF document text
- http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/85743565020.pdfIn PDF document text
- https://eatorhours.org/e-bussiness/fckimages/file/99051933137.pdfIn PDF document text
- http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e779ac1b8d---88629750293.pdfIn PDF document text
- https://taechoclub.com/FileData/ckfinder/files/20210922_335D15F0A091B9BF.pdfIn PDF document text
- http://harmonie-avion.fr/actualite/files/dokojaxezapi.pdfIn PDF document text
- https://rts-wm.com/ckfinder/userfiles/files/52070625802.pdfIn PDF document text
- http://englandmatchshirts.com/assets/file/27552831438.pdfIn PDF document text
- https://fong-cai.com/upload/files/89274984072.pdfIn PDF document text
- https://proetcontra.hu/userfiles/file/zovixepofelijaxojojoxumu.pdfIn PDF document text
- http://boschvietnam.vn/files/usersfiles/files/memiwejixitikodabapag.pdfIn PDF document text
- https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/c7c67e4bbcde104c12d991fbe86ee18e/nunok.pdfIn PDF document text
- https://aljazeerahpetroleum.ae/userfiles/files/48630923047.pdfIn PDF document text
- https://medbillings.us/lightspeedweb1/file/ketesitupuga.pdfIn PDF document text
- http://kdwatch.net/upload/files/2021090704053080.pdfIn PDF document text
- http://korealabels.com/ckfinder/userfiles/files/zuwunumosegamerejipipalog.pdfIn PDF document text
- https://serpavenger.com/ckfinder/userfiles/files/kotozazuvaweti.pdfIn PDF document text
- https://agrocare.ro/ckfinder/userfiles/files/78694818171.pdfIn PDF document text
- http://star-transform-moscow.ru/uimg/files/beturuzetimovaduwot.pdfIn PDF document text
- http://homelife-superstars.com/image/files/85831247867.pdfIn PDF document text
- https://a-metal.e-giant.net/archive/file/files/88692875994.pdfIn PDF document text
- https://alharithiforcameras.com/ckfinder/userfiles/files/lopavolaba.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_off0000da3d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA3D	10400 bytes
SHA-256: `6de2df7ce125ebfd2a664ad65eab69fb473de5278d38648403d620bef4d848a1`
`font_01_sfnt_off0000f1f8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1F8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010a0a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A0A	20088 bytes
SHA-256: `35025dfca440d7f15b0d3827897093e2eb55e9a1b13d9853c77fe91f778558b5`

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