PDF malware analysis — malicious · 3d25bd899f621e2c

MALICIOUS

PDF

71.3 KB Created: 2021-09-01 06:59:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 1f7a48f7427c93aae37bcc1874bdc95a SHA-1: 9227fdc232290ec019144db9d25438dd1eeabf47 SHA-256: 3d25bd899f621e2cf888e2fcf2f3ede1776994cfadfc4cf828172e42b8dcafed

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a link farm directing users to multiple compromised WordPress upload directories and other disposable hosting sites, each serving another PDF. ClamAV and ML classifiers identified this as a phishing or malicious PDF, indicating a likely attempt to lure users into downloading further malicious content. The primary attack pattern involves directing users to malicious content hosted on compromised infrastructure.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

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
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.
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://www.brickchamber.com/ckfinder/userfiles/files/zurekijavizevokixika.pdf In PDF document text
- https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a9b894038---gilopokoruj.pdfIn PDF document text
- https://gamaconsultores.cl/upload/file/4031672041.pdfIn PDF document text
- http://dominoliberec.eu/images/file/files/demizuvegudeluzozo.pdfIn PDF document text
- http://hf1968.com/clients/48820/File/66312019641.pdfIn PDF document text
- https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079268f780a2---51463822115.pdfIn PDF document text
- http://automozg.by/upload/editor/files/lofirawolag.pdfIn PDF document text
- http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/20fc8ef81b8b30ac6c2867e84da7254a/6157890226.pdfIn PDF document text
- http://bmcnx.com/userfiles/file/liruma.pdfIn PDF document text
- http://bebsulmare.com/userfiles/files/zibotedi.pdfIn PDF document text
- http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/f0edbda68ab1649637b6479022c18919/97204095143.pdfIn PDF document text
- http://jhdjt.com/images/upload/File/87346249060.pdfIn PDF document text
- http://leaguengn.com/userfiles/file///1406571738.pdfIn PDF document text
- https://cape-electronics.com/media/file/muvolexu.pdfIn PDF document text
- https://camgloberealtor.com/userfiles/file/7014281679.pdfIn PDF document text
- https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c96cbd7bdb---lifegirixixatolefof.pdfIn PDF document text
- https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/52271885606.pdfIn PDF document text
- http://alanurturizm.com/rsm/files/zixisi.pdfIn PDF document text
- https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/14f27df891412214b5d3fbe0f717c338/46711427248.pdfIn PDF document text
- http://emannsltd.com/userfiles/59456984436.pdfIn PDF document text
- http://business-baltic.com/myfiles/dok/dimexinewipixizot.pdfIn PDF document text
- https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/of2q4qc9vbv4aomlubip0ce7t4/10232839225.pdfIn PDF document text
- https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/kui8rg51n1fkibfii94lmnntdu/levedafolexebujun.pdfIn PDF document text
- http://goddesshair.net/upload/users/files/71018512614.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=meaning+of+haitPDF 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_off0000b4b2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB4B2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ccc4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCCC4	16904 bytes
SHA-256: `3970155629ec96168be31a77c095b7d6a61e7050471e4efd48800a5006403555`
`font_02_sfnt_off0000f725.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF725	10172 bytes
SHA-256: `95acdb42d1bdb8d530e57ffad48befe7b5580754ebc4bcb32254fe2896ec27cc`

Open this report in the interactive analyzer, or submit your own file for analysis.