PDF malware analysis — malicious · d416bbe6522964da

MALICIOUS

PDF

72.4 KB Created: 2021-09-24 15:06:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 63124b76bf5ad75db27936c26f517cc0 SHA-1: 4b4c4e4e327660a56a390f121f6bafe0f5f68af0 SHA-256: d416bbe6522964da9d47e72e95cb896164bd29eb84a6926ec5eea91e67da71f1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, with multiple heuristics indicating it is a link farm pointing to compromised websites and disposable hosting. The PDF contains numerous embedded URLs, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure and URL patterns are consistent with common phishing lures.

Machine Learning

Nyx PDF Classifier malicious score 0.9908

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
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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.
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://oniceh.ru/uplcv?utm_term=funny+emoji+gif+download PDF link annotation
- https://rotterdampools.com/contents/files/vubonureposasitisagarevo.pdfIn PDF document text
- http://peter-crooks.com/userfiles/file/xodukuburuneronopo.pdfIn PDF document text
- http://studiovalecchi.it/userfiles/files/55231762680.pdfIn PDF document text
- http://shijijiaming.cn/filespath/files/20210909191614.pdfIn PDF document text
- http://karthikeyanjayaram.com/userfiles/file/potopujop.pdfIn PDF document text
- http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614cccecb1af0---mogexewezoze.pdfIn PDF document text
- http://kyochonbuenapark.iorderfoods.com/uploads/files/60319281353.pdfIn PDF document text
- http://richmore.kr/uploadfile/fckeditor/file/9719298923.pdfIn PDF document text
- http://phuocthuan.vn/images/pic/file/12841479949.pdfIn PDF document text
- https://medpressa.ru/files/file/merenasidotapixisidewuzo.pdfIn PDF document text
- https://hbfilm.ca/resimler/files/rajidizuzujazewazi.pdfIn PDF document text
- http://eapver.com/upload/ckimg/files/202109160053421679.pdfIn PDF document text
- https://telliogluhukuk.com/userfiles/file/mugofetorudozawuwufepifu.pdfIn PDF document text
- https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/to1ij58lis1a4c4u2a20ucki0u/55493106646.pdfIn PDF document text
- http://creaorganization.com/depo/sayfaresim/file/88949133065.pdfIn PDF document text
- http://ahcxdq.com/uploads/file/02072208649.pdfIn PDF document text
- https://fallsplat.se/bildbank/file/95793567502.pdfIn PDF document text
- http://naasschoolofmotoring.ie/fckeditor/userfiles/file/sijemoxiz.pdfIn PDF document text
- https://acrgroup.nl/userfiles/file/wekesularidoxafurelurupux.pdfIn PDF document text
- http://epmresearch.org/userfiles/files/1735186358.pdfIn PDF document text
- https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/f8e77qpcg5ianj5am3s4pavu9v/1039290527.pdfIn PDF document text
- https://binarbaid.com/public_html/userfiles/file/rezunopezuvezudirulok.pdfIn PDF document text
- https://ibshospitals.com/userfiles/file/88586698237.pdfIn PDF document text
- http://gapoom.com/upload/fckeditor/file/toxima.pdfIn PDF document text
- https://weyergans-hcc.lv/userfiles/file/balugifuxafasudebujodew.pdfIn PDF document text
- https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/0dc00e7fa85fc5204d8811d99563d175/62383319664.pdfIn PDF document text
- http://kxnjl.com/userfiles/files/54460994183.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_off0000b7a6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB7A6	16516 bytes
SHA-256: `a8d51cb74ee7f310cecd5b06bc9929a3dca96af88f94e80cbaaa23101b026614`
`font_01_sfnt_off0000e1aa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE1AA	10736 bytes
SHA-256: `40f986a0ac63e0f788c8e98c46bf96f9f0b04b1e72776d0380b106ecafcb9845`
`font_02_sfnt_off0000fa1c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA1C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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