PDF malware analysis — malicious · 9501da5585f3e2bf

MALICIOUS

PDF

83.4 KB Created: 2021-09-20 21:19:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 0b7e0882f3f45d80f486628ca80e85da SHA-1: 98c40663de89ba763b58cb332cd9c2bfb9ebdf8c SHA-256: 9501da5585f3e2bfc89b9d4c9dba9b773e6a20103c56c745bf067523d0905275

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, with high confidence. It contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users. The presence of numerous external links, many pointing to PDF files on various domains, indicates a potential phishing or credential harvesting attempt, or a distribution point for further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://redengewinnt.com/userfiles/file/gevedorud.pdf In PDF document text
- https://nordavril.com/userfiles/file/foveletozivuf.pdfIn PDF document text
- http://bienbao.org/uploads/files/janajedudo.pdfIn PDF document text
- https://shastriratanchatterjee.com/ckfinder/userfiles/files/14493702644.pdfIn PDF document text
- https://oglethorpeclub.org/~oglethor/UserFiles/file/wepududesa.pdfIn PDF document text
- https://coherence.cz/userfiles/file/50949350313.pdfIn PDF document text
- https://autosaloncenter.com/uploads/file/56491427231.pdfIn PDF document text
- http://hoangnampte.vn/quangbasanpham/app/webroot/upload/image/files/moxakaziwudi.pdfIn PDF document text
- http://alarm.pl/userfiles/file/finatibematab.pdfIn PDF document text
- https://felicitareonline.ro/ckfinder/userfiles/files/jetet.pdfIn PDF document text
- https://malabarmail.com/ckfinder/userfiles/files/luvewubug.pdfIn PDF document text
- http://vinabomi.com/uploads/userfiles/file/92221297292.pdfIn PDF document text
- http://hyunshin.net/userfiles/file/bisotepofasotalukalafakof.pdfIn PDF document text
- https://goodluckfishing.com/ckfinder/userfiles/files/44075425564.pdfIn PDF document text
- http://kurumakaitori-one.com/js/upload/files/94915994847.pdfIn PDF document text
- http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9d2fc08cd---26821086252.pdfIn PDF document text
- http://jeanthompson.nl/ckfinder/userfiles/files/kagasunasufatogagizup.pdfIn PDF document text
- http://cesarrodarte.com/userfiles/file/57007498407.pdfIn PDF document text
- http://vibrobeton.by/pics/files/37789886631.pdfIn PDF document text
- https://taxfirma.com/userfiles/file/mifowemekas.pdfIn PDF document text
- https://karapinler.com/calisma2/files/uploads/8385821156.pdfIn PDF document text
- https://pushtypathshala.com/demo/aims/files/images/files/molidifejanopadatixot.pdfIn PDF document text
- http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1613fdeaca655c---65829344627.pdfIn PDF document text
- http://hueide.com/upload/files/39451410823.pdfIn PDF document text
- https://n-tlg.com/files/file/9876973425.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=como+controlar+o+android+pelo+pcPDF 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_off0000dedd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDEDD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f6f4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6F4	10536 bytes
SHA-256: `8bd8e81051308079c741d59bbbb0f72c7b95a442ddd27f19e38ab2885afbef76`
`font_02_sfnt_off00010ee0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10EE0	19636 bytes
SHA-256: `cf7bb0d993fb8cc58f9819fac8e6aad7e0213be7bd0d1e7ab3ac9383b42fd228`

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