PDF malware analysis — malicious · bdfd701a966d0948

MALICIOUS

PDF

77.3 KB Created: 2021-09-27 10:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 526ac0955cc87c7c1e770f09e72e29f2 SHA-1: c291e975a49cfdf4513e9a41a0a62d1db8b27de6 SHA-256: bdfd701a966d094815d91c6e26f7bfb5e272938aa05bac4175d1afb0f9ae7a2f

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating it is designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JavaScript points to its use in executing malicious actions within the PDF context.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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.
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://pistant.ru/uplcv?utm_term=nxxxa+ace+video+converter+free+download+for+windows PDF link annotation
- http://www.offshoreyachts.net/web_upload/editor/files/fewupef.pdfIn PDF document text
- https://clubberia.com/js/ckfinder/userfiles/files/wesotonivalo.pdfIn PDF document text
- http://everbeenmagnet.com/js/upfiles/files/bekosusebokapujeduronu.pdfIn PDF document text
- http://naszemotyle.natura2000.pl/imgturysta/files/79470153152.pdfIn PDF document text
- http://bargiel.com.pl/ckfinder/userfiles/files/lexixibitavisikipigozak.pdfIn PDF document text
- http://3wsystems.com/shipinc/userfiles/files/15312024898.pdfIn PDF document text
- http://haciogullari.com/depo/sayfaresim/file/katazepibesuvolegov.pdfIn PDF document text
- http://diskacme.dk/images/upload/file/39335775139.pdfIn PDF document text
- http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140ccb233ae3---lelupivojovanofotokaf.pdfIn PDF document text
- http://demo755.webbazaar.com/uploads/dakowabome.pdfIn PDF document text
- http://shiny-baby.com/fileimage/file/xaxoxoxoremawig.pdfIn PDF document text
- http://epodhajska.eu/UserFiles/File/tenuza.pdfIn PDF document text
- http://ecohort.com/userfiles/files/20418490791.pdfIn PDF document text
- http://tufaghanafc.com/js/ckfinder/userfiles/files/badinifi.pdfIn PDF document text
- http://www.juniorcollege.cl/ckfinder/userfiles/files/22308951093.pdfIn PDF document text
- http://urbariatprasice.sk/upload/file/naxitevokoxunefirugas.pdfIn PDF document text
- https://fiscalonline.eu/app/webroot/files/userfiles/files/37890916641.pdfIn PDF document text
- https://newsale.linyn.mobi/upload/ckeditor/pages/files/72377762590.pdfIn PDF document text
- http://www.smwiarus.pl/ckfinder/userfiles/files/depizotakitusamate.pdfIn PDF document text
- http://zwickerfoto.hu/_user/file/kexudokunogimowediko.pdfIn PDF document text
- http://cachnhietcacham.vn/Images_upload/files/vasolefi.pdfIn PDF document text
- http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/6fbcbb78d5799024ff21f68952f35286/21364078812.pdfIn PDF document text
- http://sjhtractor.com/d/files/83997394394.pdfIn PDF document text
- http://nonstopsushi.com/uploads/files/tefalawuzarukuzawufes.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_off0000c706.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC706	10700 bytes
SHA-256: `0b9379a11184e7f659d876712add9d30ea364e5c5a3ead4be8f90ae9f20e7387`
`font_01_sfnt_off0000dfd2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDFD2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f7e4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF7E4	18180 bytes
SHA-256: `996e34317dd725b9cff9323ec5586354278c70951509ee0411159c54011d57f7`

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