PDF malware analysis — malicious · e62d6da712fd8d5c

MALICIOUS

PDF

70.7 KB Created: 2021-08-06 14:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 773f33a41dc7acb071e6bcaa14cac235 SHA-1: 377eee665255001b6a1e7758514ef815305616f7 SHA-256: e62d6da712fd8d5cbe1e73f1b2456f977d3fff77a09c7d7f0e74c9c21a2d77e6

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to compromised websites and disposable hosting, suggesting it functions as a link farm to distribute phishing or malware. The presence of these links and the overall structure align with a spearphishing attachment attack vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9352

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 https://queure.ru/uplcv?utm_term=how+to+program+xfinity+remote+to+yamaha+receiver PDF link annotation
- http://geluidsadviesnederland.nl/ckfinder/userfiles/files/94937672310.pdfIn PDF document text
- https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/bd36327f8585619ba8467b71613d9106/97587725838.pdfIn PDF document text
- https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/7f95f14ca1bb16df6151f2eba49542cf/44381438263.pdfIn PDF document text
- https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c03e02500ad---21815559216.pdfIn PDF document text
- http://nfc-lampang.com/user_img/files/10852991834.pdfIn PDF document text
- http://vector-mebel.ru/uploads/files/13272864151.pdfIn PDF document text
- https://mrdak.cc/uploadfile/files/zadonewepibozupasikewego.pdfIn PDF document text
- http://www.multigacos.com/admin/uploaded/fck/file/74828146038.pdfIn PDF document text
- http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/a0642c8e9c2a2e976c8bc7685007072a/wanimu.pdfIn PDF document text
- https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/7ba20bae2c2f54af06066b489d1783e4/45070783058.pdfIn PDF document text
- https://bselink.com/userfiles/file/womelitebabokikemowofir.pdfIn PDF document text
- https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/1e19c4e8cd9676ead3120ace9d84c39a/votufipufe.pdfIn PDF document text
- http://billsky.ee/files/file/wegiwarufugoximesuxebaj.pdfIn PDF document text
- http://droprint.my/home/ququ4923/public_html/userfiles/file/54619396944.pdfIn PDF document text
- https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/c94c08dc0c9142de138e464c4ff18dc8/15345746636.pdfIn PDF document text
- https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097f7035d632---68861389764.pdfIn PDF document text
- http://rauvuonsach.com/images/uploads/files/pivikakonidezodibed.pdfIn PDF document text
- http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160dc1bd353f3e---jesasekomulawa.pdfIn PDF document text
- https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f917522b07e11481bac6358a0e86271f/legazuvogirenubexa.pdfIn PDF document text
- https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607518654b201---xenuzelonitipiw.pdfIn PDF document text
- http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5ee906ef6---2044775988.pdfIn PDF document text
- http://arlingtonhigh1960.com/clients/881088/File/15559369949.pdfIn PDF document text
- http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/nusoluneluxozenagoguwuli.pdfIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000edea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEDEA	11072 bytes
SHA-256: `63b8cf7677bb1afa3566a5039852d290cb1ea9190b1c6cffc6301cacd5dd176b`
`font_01_sfnt_off0001079a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1079A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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