PDF malware analysis — malicious · 93b1b028f6fab114

MALICIOUS

PDF

90.9 KB Created: 2021-08-01 11:46:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: f7803d06eeb572379b4aeb72d4339e2f SHA-1: 0eb5d1194bf6cb4c5106ce71391c3a99148d46ef SHA-256: 93b1b028f6fab114c34ad723a8e4ee2b1eb3dff24af89dcac99bed5fede65093

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a pattern of using disposable or compromised hosting for malicious links. No scripts were extracted, but the overall structure points to a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9954

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 http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/16083bfb9f33de---xiditisunaseg.pdf In PDF document text
- http://circuitvietnamcambodge.com/hinhanh/file/mafisasodemuxuze.pdfIn PDF document text
- https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d88989aec2---futanevumovuruxux.pdfIn PDF document text
- http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160cb77082bea5---babuferabigexodufa.pdfIn PDF document text
- https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa051035f20---didufalobazikegimusasu.pdfIn PDF document text
- https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/54b2e52164c69fb11992ffbe855f0d26/kajesowigorapujexaxow.pdfIn PDF document text
- https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0a9fed4c1---48360649265.pdfIn PDF document text
- http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/jbk3uelhd67n52081483u4kup2/49440103022.pdfIn PDF document text
- http://1parareunion-club.com/clients/4/48/482fc251494624b09083a87f212a12d7/File/nunuj.pdfIn PDF document text
- http://azizolace.cz/images/file/48710254979.pdfIn PDF document text
- https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16098959c60866---sulotodegukalewozajazifi.pdfIn PDF document text
- http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f041d46b2b---74556554110.pdfIn PDF document text
- http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a817825fa90---97799865159.pdfIn PDF document text
- https://pianoinprimopianofestival.com/uploads/file/77336457696.pdfIn PDF document text
- http://ledseoul.com/userData/board/file/66955622995.pdfIn PDF document text
- http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/gk4p6cobkn464cfq3pqj5mi7sb/furiku.pdfIn PDF document text
- https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/q8rco2mp8mf04e39a9quqeno1f/kazometibipalu.pdfIn PDF document text
- http://nelly-design.ru/upload/files/wodokofujogolekotosumag.pdfIn PDF document text
- http://denkobarbell.com/_upload/files/bakajuwenuxomepojok.pdfIn PDF document text
- http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bc34a692610---57918064850.pdfIn PDF document text
- http://www.hydro-tg.pro/upload/file/zovodamimibujativolel.pdfIn PDF document text
- http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/ek43m8onimjur303er5lu1j674/wogedigizope.pdfIn PDF document text
- https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/ed4682b29ee51805a5b1d0dafd1ee293/poruxepetimipisejeto.pdfIn PDF document text
- https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2188d5817---noseki.pdfIn PDF document text
- https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073911d168f1---xebakovirisavinijewu.pdfIn PDF document text
- http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ab1137f66---wivow.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=what+does+a+chicken+fart+sound+likePDF 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_off0000fc6e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC6E	17836 bytes
SHA-256: `63eba6ae7aabe81f8cb343c6ab4b22485eb19e632ab8328e6e012492cbb2eca7`
`font_01_sfnt_off00012b2c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B2C	10760 bytes
SHA-256: `613d8b7194eb19fada1c2d311da0cad5ec6b66461975e943b41603c4bac51965`
`font_02_sfnt_off000143e7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x143E7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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