PDF malware analysis — malicious · 4e8f1f3de99b4425

MALICIOUS

PDF

92.4 KB Created: 2021-07-05 23:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 664b461ffb1a4003b5091dd94ed3929e SHA-1: 32e1b90a42b3c04015aba2fee161170d594f255b SHA-256: 4e8f1f3de99b44256cd812725c14484aa39fc9d9c76c36f9ab5db369c07a9245

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous compromised WordPress uploads and disposable hosting sites, suggesting an attempt to distribute malicious content or redirect users to phishing pages. No scripts were extracted, but the presence of numerous external links indicates a likely intent to lure users into downloading further payloads or engaging in fraudulent activities.

Machine Learning

Nyx PDF Classifier malicious score 0.9934

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
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 https://pistant.ru/uplcv?utm_term=after+we+collided+online+stream+english PDF link annotation
- http://aldo-ins.com/userfiles/file/woporajujaroborom.pdfIn PDF document text
- https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/hdekidupendonmhs7bafu9vbi3/2874714420.pdfIn PDF document text
- https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/16096b3ce9424d---1912267767.pdfIn PDF document text
- http://dienmaythanglong.org/uploads/files/xigixegumubi.pdfIn PDF document text
- http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc5cede537f---68542329590.pdfIn PDF document text
- http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7875093ae---56050075836.pdfIn PDF document text
- http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb9747f0ae---wikopuxofobu.pdfIn PDF document text
- https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/404d2b0eac87c652c74def85e2c6de64/13046747852.pdfIn PDF document text
- http://lambanghieuquangcaogiare.net/vietkiendo/upload/file/wozudanulugug.pdfIn PDF document text
- https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/rr5lchm50bhvgkbq8fhfamc400/mikasozob.pdfIn PDF document text
- http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a93cd869465---nilegumogarotopu.pdfIn PDF document text
- https://lenaoyunlar.com/calisma2/files/uploads/pusevok.pdfIn PDF document text
- http://otoozevran.com/resimler/files/46674297856.pdfIn PDF document text
- https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/7q0nnhkc7fct7g6a0kro98n3fr/seralobazu.pdfIn PDF document text
- https://silga.ca/userfiles/file/dulaxoliwesutanusewelibez.pdfIn PDF document text
- http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e958dd30f---tafataxemokulixemexegi.pdfIn PDF document text
- https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607612d55f295---36051971931.pdfIn PDF document text
- https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16098456b609e5---9681511890.pdfIn PDF document text
- https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160996b3e09b56---18436903146.pdfIn PDF document text
- http://jucal.es/images/file/fopimilazagugelezo.pdfIn PDF document text
- https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/c3197d825a6db89fa7a1e36729a74fd3/11005433846.pdfIn PDF document text
- https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a537782f836---63915349081.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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d3c6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD3C6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ebd7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBD7	16576 bytes
SHA-256: `df3eedeae3976c41e4b0d0cf4ca3e03e2c0a174ce5548a6b09fbf00093765c32`
`font_02_sfnt_off0001030c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1030C	23436 bytes
SHA-256: `05f00747f768ebfb19732e4ff4176540255a5dcbac8493aacf99f9bb71d7be73`
`font_03_sfnt_off0001401a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1401A	2248 bytes
SHA-256: `66561d23f2eb1695a39bb9f88b80d9683298b042bd99b179776941a2f3878adb`
`font_04_sfnt_off00014a03.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14A03	10988 bytes
SHA-256: `751eed64135964a3ec6d2fc5a5f429358aa8298ba33279350cbac16b39ca7b61`

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