PDF malware analysis — malicious · 412f7f78ba84ee15

MALICIOUS

PDF

74.6 KB Created: 2021-09-17 17:59:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 6e879a61904b2594fde03a6921d02b3f SHA-1: ddde3cddad9ee2776b266f81a6da655ec37b079f SHA-256: 412f7f78ba84ee15339ab70d029c8b452daa13371f6e368c11dda6c8b8ee5189

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'Download' button lure and ClamAV detection as 'Pdf.Phishing.Trojan' further supports a phishing or malware distribution attack pattern. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or downloader campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

Heuristics 7

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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=convert+word+to+pdf+on+macbook PDF link annotation
- https://wisestudentz.com/userfiles/file/guwazivoveludaf.pdfIn PDF document text
- http://quatangsongvan.com/hinhanh_fckeditor/file/pokakezebu.pdfIn PDF document text
- http://azizavacanze.com/userfiles/files/91774535600.pdfIn PDF document text
- http://problemconsulting.com/img/download/files/39022007937.pdfIn PDF document text
- https://ijfbacknumber.com/editor_up/81312807879.pdfIn PDF document text
- https://swalaya.in/userfiles/file/3894618478.pdfIn PDF document text
- http://aquaclub.hu/userfiles/file/kiwimovofezalidazilak.pdfIn PDF document text
- https://episcopiaoradiei.ro/files/jipeseguriwikijenozam.pdfIn PDF document text
- https://lingchuanfloor.com/app/webroot/userfiles/files/zuxupalakipu.pdfIn PDF document text
- http://movietek.vn/hinh-anh/files/fibetebefositanixejos.pdfIn PDF document text
- https://x-software.cz/data/file/jopesutojas.pdfIn PDF document text
- https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132c4da67893---65151971546.pdfIn PDF document text
- https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/gskuc5af03kjeamqnjmauf8go8/26814650659.pdfIn PDF document text
- http://whatcanidoforyou.eu/publish/file/lamurekoposodiwozumisik.pdfIn PDF document text
- http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/fe449d88ee8459028d481cc8ab4bdf6a/9827157532.pdfIn PDF document text
- http://dailythang.com/userfiles/files/kogavu.pdfIn PDF document text
- http://travelsi.ru/ckfinder/userfiles/files/6902454193.pdfIn PDF document text
- https://greenline.bg/userfiles/file/74965328916.pdfIn PDF document text
- http://gndpta.eu/news_objects/files/43976873571.pdfIn PDF document text
- https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/161404b48189b8---vonuxumunafut.pdfIn PDF document text
- http://zeroseistudio.eu/userfiles/files/4753833083.pdfIn PDF document text
- https://sanruouvang.net/images/uploaded/file/begeja.pdfIn PDF document text
- http://thaoduocvn.com/userfiles/image/file/544176435.pdfIn PDF document text
- http://tourister.kr/userfiles/file/27839281580.pdfIn PDF document text
- http://planao.com/ckfinder/userfiles/files/vorawutisanunekeb.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_off0000c02f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC02F	10892 bytes
SHA-256: `4e33d92e72dc2e7739058c0677a482e68aabc627f45890c09224dd84336ddb61`
`font_01_sfnt_off0000d94a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD94A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f15c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF15C	16764 bytes
SHA-256: `f62c426cdd5d73595e6322cbc3ef8a1bde3f9172f295cebd27ba30a14fdbf826`

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