PDF malware analysis — malicious · 84b1046eba9eae13

MALICIOUS

PDF

81.9 KB Created: 2021-09-19 12:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: c10208be7ea8edf06ec0863325a1cab4 SHA-1: 869256ee95eac5f37d3ea43847ed8854e7249d43 SHA-256: 84b1046eba9eae13f13e3e0e01bd85c6751d2d0eed8929a20f49ae1243422fc5

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file exhibits characteristics of a phishing lure, indicated by the presence of multiple links pointing to compromised websites and a heuristic firing for a 'download button' lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading further malicious content. Although no scripts were explicitly extracted, the PDF structure and linked URLs are indicative of a phishing campaign aiming to distribute malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9981

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://huntic.ru/uplcv?utm_term=season+pro+football+manager+mod+apk PDF link annotation
- https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e7345d6ba---84709867688.pdfIn PDF document text
- https://beeshark.ro/app/webroot/files/userfiles/files/vajarabubip.pdfIn PDF document text
- http://bkmarine.net/ckfinder/userfiles/files/1632042856.pdfIn PDF document text
- http://broadgatecapital.com/userfiles/file/64301859600.pdfIn PDF document text
- http://euredit-editions.com/userfiles/file/1997155741.pdfIn PDF document text
- http://debseven.net/UserFiles/File/vifopipegepijumivila.pdfIn PDF document text
- https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/14ef327d702abbdf3efe23cc9533abfd/roxujudedemobemod.pdfIn PDF document text
- http://studiotecnicofrisoli.com/userfiles/files/pirafegaresisojekar.pdfIn PDF document text
- https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/b2ae109a31a8eda0e72261b38eabeff4/fozakoxilukusowakoxexu.pdfIn PDF document text
- http://0225674989.kad.tw/kads/ckfinder/userfiles/files/poxapilijuruzolezoso.pdfIn PDF document text
- https://hotelite.in/userfiles/file/vuzalaniluferogifew.pdfIn PDF document text
- https://www.osteopathe-montpellier-sud.fr/ckfinder/userfiles/files/relewamikujuvo.pdfIn PDF document text
- https://aymsoft.us/aym_image/files/paburele.pdfIn PDF document text
- https://lmetinternationalschool.in/ckeditor/ckfinder/userfiles/files/61619155513.pdfIn PDF document text
- https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/727c69c1744dee8d2fbf04a1421dcd29/47282678925.pdfIn PDF document text
- https://lapakunited.com/contents/files/givazakosupepozojas.pdfIn PDF document text
- http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1614033f7459a8---tusuliloridupeturin.pdfIn PDF document text
- http://speckrepej.com/upload/file/xudovarel.pdfIn PDF document text
- http://sunwisechem.com/Uploadfiles/files/91317749612.pdfIn PDF document text
- http://jngf.cn/files/file/tarugudodesuxejuzagoxet.pdfIn PDF document text
- http://teleinwestor.com/userfiles/file/govejejudusevov.pdfIn PDF document text
- https://cesiedizioni.com/userfiles/file/61676209320.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_off0000d8de.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD8DE	18244 bytes
SHA-256: `b2f5ffe080e51f64be8121cbef5c42dc63696c1453bd7372546226ff760348fc`
`font_01_sfnt_off00010874.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10874	11056 bytes
SHA-256: `2d3468a267f33c5cfcb230398fb03c585c7f47a54782b79cc882aaeafab46d7a`
`font_02_sfnt_off000121bf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x121BF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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