PDF malware analysis — malicious · 78021ee8409e07a2

MALICIOUS

PDF

85.2 KB Created: 2021-09-01 02:11:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 0432c0eadb037a31c776e22a8696b4f9 SHA-1: 10e8384b24d291433c642f49550a4841c8d8bc9b SHA-256: 78021ee8409e07a24b2d113c15d1e7e1fde2686b79d22b9ae598f19ff1bd5a0f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or malware distribution intent. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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 https://drafthe.ru/uplcv?utm_term=the+dead+letter PDF link annotation
- https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/g9rnk4fb72k7tbriqnbo3boi90/73970532506.pdfIn PDF document text
- http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b207b28d4df---99214250141.pdfIn PDF document text
- http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a29550e78ae---ropewezipi.pdfIn PDF document text
- http://lncxjzxxw.com/upload_fck/file/2021-7-14/20210714123239503631.pdfIn PDF document text
- http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1611f953cd62c1---37910996133.pdfIn PDF document text
- http://asztalosweb.hu/userfiles/file/57997203911.pdfIn PDF document text
- https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/jl682ehqgn2pmdm98b7hot0p6h/17287566368.pdfIn PDF document text
- https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/0149208483e51ba41d36c97b29ccac5c/13471301578.pdfIn PDF document text
- http://studiotecnicofrisoli.com/userfiles/files/65554408495.pdfIn PDF document text
- https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1610297a1058d0---dabekozosuwegivogadi.pdfIn PDF document text
- https://turismopontevedra.com/ckfinder/userfiles/files/nodozu.pdfIn PDF document text
- https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/4t5v9hf43112f3po0ctgidf011/zaxomalu.pdfIn PDF document text
- http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/babbc6cf3b2428c482bb1a8db37fd1a3/loxasigamomowakazikepasi.pdfIn PDF document text
- http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160780e86847ae---33051021893.pdfIn PDF document text
- http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16121bed0ca43c---41422789343.pdfIn PDF document text
- https://unosms.us/userfiles/file/keperazixaro.pdfIn PDF document text
- https://macroedunet.com/userfiles/file/biteloxaxesowab.pdfIn PDF document text
- http://birminghamseaholmclass63.com/clients/75362/File/25590952405.pdfIn PDF document text
- http://evevoyance.fr/adh/.-/file/54081347916.pdfIn PDF document text
- https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/9820c4s79dgpanp8q694ijshhe/kipanona.pdfIn PDF document text
- http://ash-graphy.com/userfiles/file/77438555815.pdfIn PDF document text
- http://portalinmobiliario24.com/uploades/fckeditorfile/30148087369.pdfIn PDF document text
- https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/4d2d194d3486853c1bdbf83266d93629/laxuzinonofebafezodida.pdfIn PDF document text
- https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a62cae185---92958532540.pdfIn PDF document text
- https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/f3ersotqsdvoqi5b4hcnmbtgfd/zufanepukitofozenitu.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_off0000e8eb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8EB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000100fd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x100FD	18712 bytes
SHA-256: `b377a5128fd4b80af57e9363092180bbbea038d8589bef99fa330517271fe226`
`font_02_sfnt_off00013148.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13148	9824 bytes
SHA-256: `c4b3888fcc555ef1441bef10298872ffabf019c73daf9b07f9965c6d26cf607a`

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