PDF malware analysis — malicious · 607ce74988a86078

MALICIOUS

PDF

81.5 KB Created: 2021-09-14 07:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 4c1d9a61907d36a2fa9b120cd6bc9a8a SHA-1: 05822d7fc5f565c2befb10db76a87b92f1491f34 SHA-256: 607ce74988a8607811ec3e591fbb6b51f1aaf58990c32d6e42d66e4f2d3785ff

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV and an ML classifier, with heuristics indicating embedded JavaScript and a link farm structure. The embedded JavaScript likely serves to execute malicious actions or redirect the user. The numerous external URIs, many pointing to disposable domains, suggest a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

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://suncitygroup.ir/basefile/suncitygroupir/files/wijutavegibupazijiramo.pdf In PDF document text
- http://prunay-en-yvelines.fr/ckfinder/userfiles/files/84911740942.pdfIn PDF document text
- https://autopsrus.aerovents.com/ckfinder/userfiles/files/39234960026.pdfIn PDF document text
- https://peoplehelppeople.net/uploads/File/zoxadaxibilotonozevorali.pdfIn PDF document text
- http://gayaarchi.com/userfiles/file/20210907090637.pdfIn PDF document text
- http://ambvetesopo.eu/userfiles/files/50970614602.pdfIn PDF document text
- http://gabinetpro.gabinetpro.pl/kosmetyczka/krakow/files/jadokexenaj.pdfIn PDF document text
- http://chinawin-consult.com/userfiles/gifirov.pdfIn PDF document text
- http://aksaaydinlatma.com/img/editor/image/file/10637946900.pdfIn PDF document text
- https://npkfertilizerproduction.com/d/files/volid.pdfIn PDF document text
- http://modern-pro.ru/files/file/roludowego.pdfIn PDF document text
- http://moonlightmontessori.com/upload/files/82759676417.pdfIn PDF document text
- http://soepcentrale-dekeyser.be/userfiles/file/xaguvubogo.pdfIn PDF document text
- https://qfuse.it/images/uploaded_files/ckfinder/files/1631172041_97ef60c635.pdfIn PDF document text
- https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b508bb2790---siputovawek.pdfIn PDF document text
- http://hawaiisushi.iorderfoods.com/uploads/files/66420624398.pdfIn PDF document text
- http://ipceurope.eu/assets/file/38348575118.pdfIn PDF document text
- http://bippex.com/filespath/files/20210902185110.pdfIn PDF document text
- https://www.tahitotfalu.hu/ckfinder/userfiles/files/96754717688.pdfIn PDF document text
- http://ldkxzzs.com/images/userfiles/file/78712321159.pdfIn PDF document text
- https://ihappywash.com/uploads/files/202109031018005529.pdfIn PDF document text
- http://cocoon-source-harmonie.fr/public/file/77037468695.pdfIn PDF document text
- http://hokkaido-love87.com/app/webroot/js/ckfinder/userfiles/files/zupudojad.pdfIn PDF document text
- http://jungam21.com/upfiles/file/1631273316.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=minecraft+hack+androidPDF 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_off0000d40d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD40D	20012 bytes
SHA-256: `dd0e3a26aa5da2c8a433ffda360dcd974a39c4c4aeb8ed4191d80dab35bca3cb`
`font_01_sfnt_off0001091c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1091C	10444 bytes
SHA-256: `a35fe69a795a7a2b416ed55a5a67ce731a195d29aa72713873e9549e2b691935`
`font_02_sfnt_off000120c3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x120C3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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