PDF malware analysis — malicious · 00da2cdb4d24c500

MALICIOUS

PDF

79.3 KB Created: 2021-09-18 09:38:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 7cdf4b6c62a9fe2f1ab7806486d73f4d SHA-1: 2dc7e9c4ea1d8f1fa01567ed19d348339c0059e2 SHA-256: 00da2cdb4d24c50092825b0f1f7f4b7972c241775bc2e5771fd158b212eed440

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The presence of numerous external URIs, many pointing to disposable domains and configured as link farms, strongly suggests a phishing or malware distribution attempt. The document body is heavily obfuscated and unreadable, but the heuristics indicate a QR code lure, further supporting a phishing pretext.

Machine Learning

Nyx PDF Classifier malicious score 0.9968

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://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b86e23993d---99240980903.pdf In PDF document text
- https://paradigma.bg/uf/file/6720367290.pdfIn PDF document text
- http://szzxwx.com/Upload/Upload/file/202196239475829.pdfIn PDF document text
- http://dzstock.com/Upfiles/file/favazugowavagev.pdfIn PDF document text
- https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/251ec51e04bdb5088a52e24d2a997388/litazatagozefosefi.pdfIn PDF document text
- http://revistaspontan.ro/assets/ckfinder/core/connector/php/uploads/files/82141005439.pdfIn PDF document text
- http://clinivetmadonnadirosa.eu/userfiles/files/76018172423.pdfIn PDF document text
- https://tommytest.dish1314.com/data/html_editor/files/joliloziripekilo.pdfIn PDF document text
- https://ndmoyun.com/calisma2/files/uploads/78685717226.pdfIn PDF document text
- http://www.iciparis.ru/ckfinder/userfiles/files/noxapebem.pdfIn PDF document text
- https://albertoangel.sinecsas.com/ckfinder/userfiles/files/79446147585.pdfIn PDF document text
- https://braintreeclinics.com/app/webroot/img/files/1010818979.pdfIn PDF document text
- http://eminenceinc.com/userfiles/file/55719145129.pdfIn PDF document text
- https://mkycc4.com/kycc4.com/userfiles/files/begaxelitidir.pdfIn PDF document text
- http://baoveantam.info/upload/files/13370529357.pdfIn PDF document text
- http://xinyaoqiye.com/upload_fck/file/2021-9-14/20210914015512114297.pdfIn PDF document text
- http://agataklimowska.pl/userfiles/file/defimovufizawixopewad.pdfIn PDF document text
- https://koltoztetes-szallitas-lomtalanitas.com/ckfinder/userfiles/files/82603460278.pdfIn PDF document text
- http://dryoucosmeceutical.com/userfiles/files/taxanubiwixaxafuf.pdfIn PDF document text
- https://venefoil.com/ckfinder/userfiles/files/49695580717.pdfIn PDF document text
- https://stollerco.com/testingsites/advantage_aviation/assets/media/file/fujosolizijonufoxijupibip.pdfIn PDF document text
- https://aildf.in/userfiles/file/92931209019.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=qr+code+reader+on+android+phonePDF 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_off0000d257.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD257	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ea69.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA69	17908 bytes
SHA-256: `eab0b99d324d5de31836a82a9f237fcdb533deccc3cbc47d562368cd0e9c2a0e`
`font_02_sfnt_off000118cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x118CF	10356 bytes
SHA-256: `32e50f6d9bd6154a2490be3102804372fd44473f373adfcb076a60a73d44502f`

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