PDF malware analysis — malicious · 0e074d9b8e0d001f

MALICIOUS

PDF

82.4 KB Created: 2021-09-09 22:03:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: d5184b63d88a1b7006b8f57c92314607 SHA-1: 79099c970d119ff751cf674cac618de36759c793 SHA-256: 0e074d9b8e0d001fd0d2aa9c1f81d3627f20ef60c792a26a8951aeaa3069a083

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious download lure. The ClamAV detection and ML classifier strongly suggest malicious intent. No scripts were extracted, but the structure and URL patterns are consistent with a phishing campaign aiming to trick users into downloading malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9981

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.
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 http://tartak-monis.pl/tartak/images/file/rudigabuken.pdf In PDF document text
- http://yogaschoolofkerala.com/photos/editor/files/suwutugifam.pdfIn PDF document text
- http://clinicaveterinariacene.com/userfiles/files/zefizajisetonepek.pdfIn PDF document text
- http://fuyu.010bi.com/ckfinder/userfiles/files/43914406939.pdfIn PDF document text
- https://ph2020.org/FCKeditor/file/2635066448.pdfIn PDF document text
- http://sushiosushi.com/uploads/files/juzuturotibapotizufexo.pdfIn PDF document text
- http://banglenhospital.com/UserFiles/File/juwajovekanitumufa.pdfIn PDF document text
- http://hoclaixebinhthuan.com/upload/contentFile/file/1925672096.pdfIn PDF document text
- https://wyslijpaczki.pl/app/webroot/files/userfiles/file/tugomosejulovusipebesan.pdfIn PDF document text
- http://cdjuchuan.com/upload/files/48731231204.pdfIn PDF document text
- https://nuttydog.hu/ckfinder/userfiles/files/bazazejoxiletuxemakubub.pdfIn PDF document text
- http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/edd35240c676b112411b1ab28b0b19fb/55128165001.pdfIn PDF document text
- https://braus.uz/images/shared/file/bupidiwudalifufefejokoguf.pdfIn PDF document text
- https://cakenflowersonline.com/userfiles/file/rejikurulokazigi.pdfIn PDF document text
- http://toptoptraining.ru/img/upload/file/75539301021.pdfIn PDF document text
- https://granitnet.hu/editor_up/mikeketinaruxepuwapiba.pdfIn PDF document text
- https://nedimgame.com/calisma2/files/uploads/41812913642.pdfIn PDF document text
- http://osteriadelcampanile.com/userfiles/files/pojefomurepevepukalav.pdfIn PDF document text
- https://xn--80aesyq.xn--p1ai/files/file/43019922630.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132d1cd7a2ea---dalanewasuwis.pdfIn PDF document text
- http://medical-1669.com/userfiles/files/vitomixiranopewa.pdfIn PDF document text
- http://flashdisplay.net/UploadFiles/FCKeditor/20210908091444.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=image+to+text+apk+downloadPDF 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_off0000d6fd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD6FD	19956 bytes
SHA-256: `2b98a1bbd0c6afe9cd942ffde3ebf90949bfb8482f712fd5f66d5ad96ed93dec`
`font_01_sfnt_off00010bc4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10BC4	10608 bytes
SHA-256: `9be817bc9ed84192616c831f4b5bfbb05afc0c4065fc7c3c834f5359af0e2c3c`
`font_02_sfnt_off000123db.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x123DB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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