PDF malware analysis — malicious · e4b6603a7aaefc03

MALICIOUS

PDF

128.7 KB Created: 2021-06-27 21:08:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 4cbc6b0b4f6aa868dd4b5d97fb0cc8fe SHA-1: 6c9bce0084721db3e5cd7b79c871f438f5c622da SHA-256: e4b6603a7aaefc03d8cf641350716f2073a5d97283f5de36d8ffe3699112e726

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm with numerous URLs pointing to various domains, many of which are hosted on compromised WordPress sites or disposable hosting. The ClamAV detection and ML classifier indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

Nyx PDF Classifier malicious score 0.5491

Heuristics 5

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
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://sbstroy53.ru/img/files/jisanemujatexo.pdf In PDF document text
- http://andrewsexes.org/clients/867461/File/dipotudazikadeziwepubomi.pdfIn PDF document text
- http://kath-kiga-bw.de/bilder/berichte/file/22652199657.pdfIn PDF document text
- http://accomplishtheimpossible.com/userfiles_ati/file/17214826543.pdfIn PDF document text
- https://aimara-bg.com/userfiles/file/kexoxugo.pdfIn PDF document text
- http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/2933a0f3c6df27730e5a17070c844fe2/xotuk.pdfIn PDF document text
- http://dfh-consulting.com/userfiles/file/kedunosopeb.pdfIn PDF document text
- http://bensonlandscape.com/editorData/file/jemizagalodam.pdfIn PDF document text
- http://quatanggiabao.com/images/uploads/files/vozuza.pdfIn PDF document text
- http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/c06d73f620e4dfa5caa950c6e85a0549/gedusatij.pdfIn PDF document text
- https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/m9oerk0692tlrfoan8mngreesp/sawowulefi.pdfIn PDF document text
- http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b03997c0d33---52008165441.pdfIn PDF document text
- http://distributoram.com/files/file/jasuxigurarofebile.pdfIn PDF document text
- http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6a998d0301---zikikarititopuv.pdfIn PDF document text
- http://volamtuyetthe.com/userfiles/file/runux.pdfIn PDF document text
- https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/176ad16b8f8779331b2abedc3f8c2116/ledafiluw.pdfIn PDF document text
- http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081eac1b5990---fimupedimezozifesebuzivib.pdfIn PDF document text
- https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/kkc6r8sdvhuffcp6h4pm88npuk/sitabokemejevibokapox.pdfIn PDF document text
- https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/leo3encbkdfaok999v8v6ns1f0/lasununajebutivobedale.pdfIn PDF document text
- https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093fcde72785---sigonewovo.pdfIn PDF document text
- https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606c965f9bbdf---32820088532.pdfIn PDF document text
- https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0b55af068---73102939139.pdfIn PDF document text
- https://papiratisk.cz/soubory/latibipirifukari.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=how+tall+is+vegeta+from+dragon+ball+zPDF link annotation
- 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_off00015ca6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15CA6	11040 bytes
SHA-256: `0968315d74baa86688246b919652579202bc89d6940cfcc9eecc7330a9fc6b0f`
`font_01_sfnt_off00017628.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17628	19424 bytes
SHA-256: `a40a2539da612dc58b4de6abf3e9987119f39cf2745326e195498eaaa7b80ffe`
`font_02_sfnt_off0001a903.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1A903	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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