PDF malware analysis — malicious · 97fe52eee9223d66

MALICIOUS

PDF

89.5 KB Created: 2021-07-03 03:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 94debe7241be8e55f519baca2866fa82 SHA-1: 015a3c359a34f02fdcea9cced0e90713f89df17b SHA-256: 97fe52eee9223d66298c90a680d8dba973eda62f144ad3dba1d5afa8258a2f38

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs pointing to compromised WordPress sites, likely serving as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, with the URLs suggesting a phishing or malware distribution campaign. No scripts were extracted, but the structure and URL patterns are consistent with a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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=5+types+of+paragraph PDF link annotation
- http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084c0e45a99a---wumevumanodokaz.pdfIn PDF document text
- http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c089d968b00---raravidetisos.pdfIn PDF document text
- https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160ccdb4b51fc4---70325026191.pdfIn PDF document text
- https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/5ee289935a118ce695c5eeb1cfb80e9a/kuwekujipumidowitadazos.pdfIn PDF document text
- https://bearings.vn/images/ckeditor/files/jagixovadinowizujog.pdfIn PDF document text
- https://alexandrapanayotou.com/web/images/static/file/kowoduverilebubuwu.pdfIn PDF document text
- http://radio6deenero.com/uploaded/files/7886466681.pdfIn PDF document text
- https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/86b7c1440f551f26c245ee0a5bc0dc57/52461674156.pdfIn PDF document text
- http://deborahkay.com/ckfinder/userfiles/files/60649480214.pdfIn PDF document text
- https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/e2610f136a5effb93adb557cfdef9eff/guzatowurunelen.pdfIn PDF document text
- https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/8c56247630547159bbf9cfb45077c45f/55921718021.pdfIn PDF document text
- https://exlite.it/ckfinder/userfiles/files/bibidamodepotufo.pdfIn PDF document text
- https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb0182e873---kusozaz.pdfIn PDF document text
- https://accuratesearch.com/userfiles/file/namatuzo.pdfIn PDF document text
- http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df6ef787d6---33051035106.pdfIn PDF document text
- https://agrilaui.com/userfiles/file/panizinenanisobodafibibu.pdfIn PDF document text
- https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c938befdb---45548829534.pdfIn PDF document text
- http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160710a193708b---kukatonugejotu.pdfIn PDF document text
- https://hospvetcentral.pt/site/upload/file/3057046482.pdfIn PDF document text
- https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/900542533a870163376b6f2082951697/54123487420.pdfIn PDF document text
- https://ariaparvaz.com/basefile/ariaparvazcom/files/62510013052.pdfIn PDF document text
- http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160cbe0cf5509a---73150065390.pdfIn PDF document text
- http://minerva-collection.net/files/files/fatunotapakuxarip.pdfIn PDF document text
- https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f9ef8a6bf---rezujivapijato.pdfIn PDF document text
- http://asiancfea.org/userfiles/file/raruvanuwevosudelogobavas.pdfIn PDF document text
- http://alituncer.com/userfiles/file/18423491958.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_off0000fbc5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFBC5	16660 bytes
SHA-256: `dc3088470dc52cf657eddefacb11947229f8928866dec23ef947229d03470073`
`font_01_sfnt_off00012707.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12707	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013f1e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13F1E	10548 bytes
SHA-256: `908f19fc4917848d22ec2e53ace993ef61e27e4be3b14be57e59307318fd1835`

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