PDF malware analysis — malicious · 4784af9d042a6824

MALICIOUS

PDF

71.3 KB Created: 2021-09-16 04:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: c250358f6faf1163d7615811daa36088 SHA-1: 00a8e0f375b6418cf811f02cafd362c67028fe0b SHA-256: 4784af9d042a6824e049822377749bd6477868c22592c5faa82442fd462d0498

134 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous unknown URLs suggest that the JavaScript likely redirects the user to a malicious website or a collection of such sites. ClamAV detection further confirms its malicious nature, classifying it as a phishing trojan.

Machine Learning

Nyx PDF Classifier malicious score 0.9840

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 https://cmf8.ir/data/file/zabone.pdf In PDF document text
- http://voyagevietnamlaos.com/hinhanh/file/lanaxifasubixojom.pdfIn PDF document text
- http://hlqh.net/userfiles/file/20210909212218_2072661437.pdfIn PDF document text
- http://homearcky.nl/userfiles/file/64489222802.pdfIn PDF document text
- http://sowiik.pl/userfiles/file/toresilosivirokugibigike.pdfIn PDF document text
- https://fanaf.com/article_ressources/file/wamezekilajebame.pdfIn PDF document text
- https://classconnbio.com/img-jacson/files/22494635825.pdfIn PDF document text
- http://sujitonweb.com/userfiles/files/60786723741.pdfIn PDF document text
- http://poltinik.ru/userfiles/file/50685193600.pdfIn PDF document text
- http://longbienco.com/js/ckfinder/userfiles/files/wowoge.pdfIn PDF document text
- http://giayviettri.com/img-ftec/files/71721063865.pdfIn PDF document text
- https://stancijanegrin.com/UserFiles/files/nimepivisevi.pdfIn PDF document text
- http://playitdirect.ca/ckfinder/uploadfiles/files/39316214080.pdfIn PDF document text
- http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614289297cd77---46593113300.pdfIn PDF document text
- https://oxfordjsr.com/userfiles/file/danebugomonerapituropef.pdfIn PDF document text
- https://kaimano.it/file/39652974551.pdfIn PDF document text
- http://djarkitek.com/temp/vinney/HTML/userfiles/file/28350549764.pdfIn PDF document text
- http://lica-mpt.it/userfiles/files/gubaxe.pdfIn PDF document text
- http://le-lemniscus-incandescent.fr/ckeditor/upload/files/73508974146.pdfIn PDF document text
- http://sys-svinding.dk/userfiles/file/mosokatebajurabavoxokidi.pdfIn PDF document text
- https://www.fibertech1.com/my_content/js/ckfinder/userfiles/files/gaxinelitexox.pdfIn PDF document text
- https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16140e4cb27550---48002745424.pdfIn PDF document text
- http://poledance-chrudim.cz/files/file/rixituketelew.pdfIn PDF document text
- https://nationalshield-uae.com/userfiles/files/594199698.pdfIn PDF document text
- https://xn--interpeas-r6a.es/upload/files/tovabituvag.pdfIn PDF document text
- https://ewastexperts.com/userfiles/files/vediwojiz.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=curse+in+korean+languagePDF 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_off0000b399.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB399	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000cbb0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCBB0	10408 bytes
SHA-256: `83988873bf20f349a9436a4e83e3c5609c456c9b55e244d39ff3cb6466f34f2b`
`font_02_sfnt_off0000e35e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE35E	17352 bytes
SHA-256: `5e45bceae3457221c62bc4750472e71baf2d3b6b9476084a458dad5b70492aa0`

Open this report in the interactive analyzer, or submit your own file for analysis.