PDF malware analysis — malicious · 93f1e3af4d7a31a8

MALICIOUS

PDF

69.1 KB Created: 2021-10-01 04:38:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: a1dfd94bbcddf03baa591e0970a8945d SHA-1: 325a4eceef49cab6fc208c3307b803365058396a SHA-256: 93f1e3af4d7a31a8a8d10b89c0c8b9b7da91523a17fff9696c630cbbe6fe8c24

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains an image-only design with a clickable action, directing users to external URLs. The presence of numerous distinct domains and UTM parameters suggests a campaign aimed at directing users to potentially malicious content or phishing pages.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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
Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE

PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
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://catamma.ru/uplcv?utm_term=install+playstore+in+laptop PDF link annotation
- http://medicom.pl/userfiles/file/84141530412.pdfIn PDF document text
- https://agrilaui.com/userfiles/file/zomumopobupawarexipaso.pdfIn PDF document text
- https://sokole-tps.pl/userfiles/file/wisunidapatakekigipegi.pdfIn PDF document text
- http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/jijekutenetodepofevalu.pdfIn PDF document text
- https://cyc-catering.pe/disac/userfiles/file/nerasimesugewavakanoniwef.pdfIn PDF document text
- http://zamgph.com/uploads/file/031545548581.pdfIn PDF document text
- http://usairsprings.com/userfiles/file/badelifu.pdfIn PDF document text
- http://narcisse.sk/editor_uploads/files/84552287679.pdfIn PDF document text
- https://smshealthcareservices.com/ckfinder/userfiles/files/95764053434.pdfIn PDF document text
- https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153e2111231a---gamatunokolekipodijul.pdfIn PDF document text
- http://dsraxys.com/uploads/vexipirezimaverome.pdfIn PDF document text
- http://studioingegneramato.com/userfiles/files/matekurozagape.pdfIn PDF document text
- http://www.alex-vasilkov.ru/images/wisdom/file/mazefowas.pdfIn PDF document text
- http://taxplus.in/images/contentimages/files/31581131782.pdfIn PDF document text
- http://driscollandgibson.com/images/edit_images/file/memufopalanusolebase.pdfIn PDF document text
- http://tbm-mova.by/images_from_html_editor/file/fukibaboxuxilinisikajore.pdfIn PDF document text
- https://pmrmhss.com/userfiles/file/tijepenuto.pdfIn PDF document text
- https://asken.as/bilder/file/44156067844.pdfIn PDF document text
- https://rimsball.com/ckfinder/userfiles/files/napomepikugakol.pdfIn PDF document text
- https://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/30875656679.pdfIn PDF document text
- https://sunrise-photon.com/upfiles/editor/files/24969406475.pdfIn PDF document text
- http://harchovyk.com/userfiles/file/fakawola.pdfIn PDF document text
- http://farmaciafici.com/userfiles/files/sanunu.pdfIn PDF document text
- http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee483825c2---95718534338.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_off0000b33f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB33F	10312 bytes
SHA-256: `d0b4ec45e3a4543f3b06eaee51e1e0092776d3d628fb430ae977a41f97e15fc9`
`font_01_sfnt_off0000caa1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCAA1	14352 bytes
SHA-256: `5c4e79aa6b80ffe4fc6855e2153b9f11a98918e73efed9553de7ab8b9b3916f7`
`font_02_sfnt_off0000ee93.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE93	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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