PDF malware analysis — malicious · a3a4f0a1201253d9

MALICIOUS

PDF

89.0 KB Created: 2021-09-21 02:29:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 90ef017faa049c34a57e097c90068ea4 SHA-1: 932aa5986581d8d3949c3989f59c501347b603a9 SHA-256: a3a4f0a1201253d966115822f3dcdfc323e1388d7777b01242f6c671eb4f8989

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many of which are part of a link farm on disposable hosting, and includes a deceptive download button. The presence of external URIs and the overall structure suggest an attempt to trick the user into downloading a second-stage payload or visiting a phishing site.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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
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://pixomot.ru/uplcv?utm_term=ome+tv+pro+mod+apk PDF link annotation
- http://ottuk-e.org/userData/board/file/87352862367.pdfIn PDF document text
- http://eminenceinc.com/userfiles/file/14994786409.pdfIn PDF document text
- http://easyliveconstruction.com/ci/userfiles/files/65231979395.pdfIn PDF document text
- https://www.gurkhasfinance.com.np/ckfinder/userfiles/files/zinivixafipamufawiramunev.pdfIn PDF document text
- https://szalkasszorutacskok.hu/app/webroot/files/content/files/pugaxopazanuv.pdfIn PDF document text
- http://hakasasi.id/userfiles/file/31347668835.pdfIn PDF document text
- https://indiansabroad.uk/userfiles/file/vodulesupagunasotedupub.pdfIn PDF document text
- https://aradovan.com/userfiles/file/pakonikeramotubo.pdfIn PDF document text
- http://viswinkelindex.nl/images/uploads/gawutufago.pdfIn PDF document text
- http://luyenthidhcanhsat.com/Images_upload/files/kezodebesupoxafa.pdfIn PDF document text
- https://mn-lawfirm.com/box/userfiles/file/47847489690.pdfIn PDF document text
- http://studiobonvino.com/userfiles/files/samavefo.pdfIn PDF document text
- http://cyc.cz/pictures/clanky/files/16087452202.pdfIn PDF document text
- http://zulaikhatextile.com/userfiles/files/46335913060.pdfIn PDF document text
- https://connatlas.com/home/conn/public_html/ckfinder/userfiles/files/7550581431.pdfIn PDF document text
- https://alohasafaris.com/files/wunotoxakaxekuse.pdfIn PDF document text
- https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141b6f4b06c2---96096669943.pdfIn PDF document text
- http://archetipoingegneria.it/userfiles/files/nijid.pdfIn PDF document text
- http://longarmquiltacademy.net/fckeditor/userfiles/file/47805037961.pdfIn PDF document text
- https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139a4821fe1e---39749826482.pdfIn PDF document text
- http://clinivetmadonnadirosa.eu/userfiles/files/3760326749.pdfIn PDF document text
- http://nedvizhimost-v-sharm-el-sheikhe.ru/uploads/files/97718008504.pdfIn PDF document text
- https://gad-elhak.com/userfiles/file/bixizorizebibukuzibix.pdfIn PDF document text
- https://rt9.rspo.org/ckfinder/userfiles/files/39831483893.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_off0000edb9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEDB9	21956 bytes
SHA-256: `e6bd2465d31b10c3e80cb188ec5718444cbe3d46c9f47a4e746027bc073e83df`
`font_01_sfnt_off00012742.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12742	10324 bytes
SHA-256: `de68cfae6759c144338d7892d3f4960a0e4bf87f4d9c07ac0b95cce7c661e25b`
`font_02_sfnt_off00013e98.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13E98	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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