PDF malware analysis — malicious · 9a9790a9189070f1

MALICIOUS

PDF

86.4 KB Created: 2021-09-23 04:55:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: f0f9b9138dda9c303cab2b648f841ec9 SHA-1: f6ee4beeb26d268ecca0a60c6ff304bf29319ed3 SHA-256: 9a9790a9189070f1d6cba2d7a6886b89b0f0f0bc3f340b7d8281e0081b15aabd

134 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT heuristic, which is commonly used to initiate redirects to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs, such as https://infrive.ru/uplcv?utm_term=amazon+prime+apk+for+windows+10, are likely part of a phishing or malware distribution scheme, leveraging a link farm on disposable hosting.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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.
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. 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 https://infrive.ru/uplcv?utm_term=amazon+prime+apk+for+windows+10 PDF link annotation
- http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/161370d2ab6fa4---botigakakewojepavozik.pdfIn PDF document text
- http://zbraneklapka.cz/ckfinder/userfiles/files/wotinisitevuwadanatifip.pdfIn PDF document text
- http://etnorom.hu/pictures/rubetiza.pdfIn PDF document text
- http://ekogamma.pl/javascript/ckfinder/userfiles/files/vadebotunesajudinovojawi.pdfIn PDF document text
- http://mondoacquapiscine.com/userfiles/files/51915090549.pdfIn PDF document text
- http://baschin-heizung.de/meineBilderAlbertGrundschule/file/dakafififevenunuzubevifax.pdfIn PDF document text
- https://batdongsandothanh.vn/luutru/files/punujekegoxozagan.pdfIn PDF document text
- http://openendrep.com/userfiles/files/66834856990.pdfIn PDF document text
- http://cobe-ing.it/userfiles/files/37267374611.pdfIn PDF document text
- https://yodishit.com/uploads/userfiles/file/12008084190.pdfIn PDF document text
- http://manuale.aziendasulweb.it/userfiles/files/42929153412.pdfIn PDF document text
- http://hairfibers24.com/upload/file/nadivukerov.pdfIn PDF document text
- http://yuhenganquan.com/userfiles/file/20210921145304_81771688.pdfIn PDF document text
- https://asiapharma.la/files/files/jilitidopusijuju.pdfIn PDF document text
- http://divyabodhanam.org/userfiles/file/5003706765.pdfIn PDF document text
- https://uslugiinzynierskie.com/eurostyl/photos/file/lixitibojedawel.pdfIn PDF document text
- http://3qlohas.com/CKEdit/upload/files/vowujumax.pdfIn PDF document text
- http://saipanbooking.com/FileData/ckfinder/files/20210914_A73B6E41354A659B.pdfIn PDF document text
- https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139e3144b8d4---46522667732.pdfIn PDF document text
- http://szintai.hu/ckfinder/userfiles/files/71152109666.pdfIn PDF document text
- http://oresteruggiero.com/userfiles/files/zizepiputabo.pdfIn PDF document text
- https://adamant54.ru/userfiles/files/welupovorugobojezirevut.pdfIn PDF document text
- http://szentimresiklos.hu/upload/file/vopugowogegepagubas.pdfIn PDF document text
- https://miet.hu/kepek/60359384558.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_off0000ebda.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBDA	10908 bytes
SHA-256: `058510d95d6734519c42c01fe19ed9d1dd9a63c081b8e71ebf02dfd9b51dd9b6`
`font_01_sfnt_off00010534.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10534	17904 bytes
SHA-256: `d35a61574d857dbd0ab6f82b57441450279a1aaffaf0d85da042aa1fee655d05`
`font_02_sfnt_off000133e6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x133E6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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