PDF malware analysis — malicious · 336fc17fb5a6687f

MALICIOUS

PDF

80.0 KB Created: 2021-08-01 18:10:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 91c521bf9e2d2ba40ef7abc7fea0780a SHA-1: 7257cc0f32c3e8ea9a3186e3e48b98806734138a SHA-256: 336fc17fb5a6687f77bdf37d31ec3b5966a52d9bbe1969747981e760cdebf26c

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. The document also functions as a link farm, pointing to numerous external URLs, many of which are hosted on compromised CMS platforms or disposable domains. The presence of embedded JavaScript and the nature of the external links suggest an attempt to redirect users to potentially harmful content, likely as part of a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.6314

Heuristics 5

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://irlanc.ru/uplcv?utm_term=mision+y+vision+de+dominos+pizza+colombia PDF link annotation
- http://mmckno2010.zkosuchdol.info/files/10674806574.pdfIn PDF document text
- https://balaji-technology.com/userfiles/file/sujiwarizuriduxira.pdfIn PDF document text
- https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0ca829ecf---kujobofife.pdfIn PDF document text
- http://hiace-yoshikawa.com/js/upload/files/77047051343.pdfIn PDF document text
- https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072d3d0a314d---dokuravaxav.pdfIn PDF document text
- https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/bc0c138c62651e1775e051f820e9e511/gabadomopo.pdfIn PDF document text
- https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/5eb2318d33fa68c6628c91a74320941e/voberimurimemitumitij.pdfIn PDF document text
- http://grandinhr.eu/images/user/file/60388105039.pdfIn PDF document text
- https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/0ridlekahc0i6q24i3pij6pq62/70553945415.pdfIn PDF document text
- http://isystem.hu/ckfinder/userfiles/files/55932546694.pdfIn PDF document text
- https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/496f580d3bb05cfd532e96c828c295eb/53532533533.pdfIn PDF document text
- http://ecohost.ru/pics/images/file/tabofedose.pdfIn PDF document text
- https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb1f4643689---kiwawo.pdfIn PDF document text
- http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd99ba6880---ritefinuzegagalafi.pdfIn PDF document text
- https://tedvandergulik.nl/userimages/file/1810330786.pdfIn PDF document text
- https://marosme.ro/hirek/file/vuxijolizigazose.pdfIn PDF document text
- http://geredekombiservisi.com/userfiles/file/dobiguxiw.pdfIn PDF document text
- http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/h332qevpt2lhvppf8d5dntqgd0/pofaloxodam.pdfIn PDF document text
- https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/3pfdlimsgca516c44cd7h4254p/sumiwelujodinased.pdfIn PDF document text
- https://acrgroup.nl/userfiles/file/wakabumovolanafawexogixuw.pdfIn PDF document text
- http://ordinate-ltd.com/file_media/file_image/file/20239875663.pdfIn PDF document text
- https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/e53hm14ob12gsjv9nrdljjiek3/nejipeju.pdfIn PDF document text
- https://wecareu.net/ckfinder/userfiles/files/najaxomoziwub.pdfIn PDF document text
- http://medica-eg.com/userfiles/file/selutitesefinate.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_off0000fcd0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCD0	10852 bytes
SHA-256: `2889095bab0300c8319ad8ea97760d081d0358bbcd045696ff3b3ee336910d5f`
`font_01_sfnt_off000115b1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x115B1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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