PDF malware analysis — malicious · 3f674813a603e295

MALICIOUS

PDF

71.5 KB Created: 2021-09-23 00:02:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 5ff504a45a27e9d100c657e56f7f7b04 SHA-1: aed5219c596b08e3ff9ae3c695d0184fff0e4116 SHA-256: 3f674813a603e29561fd99800087bbf4d336a5cf8f28fcc8f683fbc701effb19

126 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, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to suspicious domains and are structured to appear as downloadable files, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this by identifying the PDF as a link farm on disposable hosting.

Machine Learning

Nyx PDF Classifier malicious score 0.9982

Heuristics 5

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.
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://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/9b92be9aa5845d15de2b8f40d4aca89e/72990745104.pdf In PDF document text
- https://nichebearing.leaddeehub.com/userfiles/files/45171947701.pdfIn PDF document text
- https://momentous-inst.com/uploads/image/files/61905140151.pdfIn PDF document text
- https://jdsliquorlocker.com/nbloom/fckuploads/file/45732715921.pdfIn PDF document text
- http://patchworkstudio.de/userfiles/file/20145504639.pdfIn PDF document text
- https://drrajanmahtani.com/userfiles/files/75452405215.pdfIn PDF document text
- http://asid.rw/userfiles/file/85263219434.pdfIn PDF document text
- http://vigova.com/Images_upload/files/xazonenimiteja.pdfIn PDF document text
- https://casasholidays.com/scgtest/team-explore/uploads/files/60293450629.pdfIn PDF document text
- https://ketdoanbus.com/webroot/img/files/dirifoniwejefadiravezal.pdfIn PDF document text
- http://yomamasushitogo.com/uploads/files/nupexixaw.pdfIn PDF document text
- https://alhasooncorp.com/Files/files/8093901988.pdfIn PDF document text
- http://conniecorsentino.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/befenakomoziwiremofid.pdfIn PDF document text
- http://ohsongpharm.com/ckfinder/userfiles/files/11653627091.pdfIn PDF document text
- https://smilaxlabs.com/userfiles/files/pefananatasibaket.pdfIn PDF document text
- https://reklama71.ru/upload_picture/duvadalizuxegobet.pdfIn PDF document text
- http://grapes4u.ca/sites/all/sites/grapes4u.ca/files/monupajalelinaris.pdfIn PDF document text
- https://snowcat.pl/admin/ckfinder/userfiles/files/67489403817.pdfIn PDF document text
- http://mauchlineware.com/html/chapelstreet/web/userfiles/files/6737356405.pdfIn PDF document text
- https://dpengineers.info/admin/userfiles/file/dasowexi.pdfIn PDF document text
- http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612f535e78131---69170833423.pdfIn PDF document text
- http://matrix-corporation.com/upfiles/editor/files/vawawepuwepuze.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=warriors+darkness+within+free+pdfPDF 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_off0000b697.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB697	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ceae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCEAE	10720 bytes
SHA-256: `8824d3c481b2cbc2e8da9baaa83a2a65849a81531cb977303ce9ef5d8661ee7b`
`font_02_sfnt_off0000e745.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE745	16148 bytes
SHA-256: `21f3b1432fda14e5ef1eb802c224cc50b2cfe7dabaf1083293d8a1826ccc07b9`

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