PDF malware analysis — malicious · d10839d0b4b93edb

MALICIOUS

PDF

73.9 KB Created: 2021-09-07 00:16:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: 19c5b5ff0b2ecb5261bebaf3eb1c4169 SHA-1: d15fd9d50682d7cdfd4f67fbe24c9b7fb41ddd0c SHA-256: d10839d0b4b93edb313350531ee8cd7575ba64d293c62e252840e87bcacd045f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to external sites, many of which are hosted on compromised CMS platforms or disposable domains. The primary purpose appears to be directing users to malicious content, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9914

Heuristics 6

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
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://oniceh.ru/uplcv?utm_term=presbiacusia+causas+pdf PDF link annotation
- https://dcmheavyequipment.com/admin/images/file/5780055170.pdfIn PDF document text
- http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/aca760275fbf80225443fd24783b5dbe/12612050432.pdfIn PDF document text
- https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/7e0c4c22ca88dcd55a2101123db8c21d/88224335348.pdfIn PDF document text
- https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/161129567efceb---pawawagibozetarulavopuni.pdfIn PDF document text
- http://ekachaiguitarist.com/ckfinder/userfiles/files/nalamejuxene.pdfIn PDF document text
- http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b897105059---64474780273.pdfIn PDF document text
- https://aravlicraft.com/cmsCart//upload/file/2799510495.pdfIn PDF document text
- https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/1g01p97eaegcb38arbvmmi55nq/72814339860.pdfIn PDF document text
- http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1611602ff07469---sexebineb.pdfIn PDF document text
- http://shiksha24.com/userfiles/files/xipevepure.pdfIn PDF document text
- https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ffd95edb78---zemoleziroxugelabox.pdfIn PDF document text
- http://efrex.cz/files/file/50632642848.pdfIn PDF document text
- http://tdbakademi.org/userfiles/files/mirupaxefat.pdfIn PDF document text
- https://soechi.com/userfiles/file/69553136773.pdfIn PDF document text
- http://studiosantese.eu/userfiles/files/7393831380.pdfIn PDF document text
- http://capitolmetrophysicaltherapy.com/userfiles/file/tebej.pdfIn PDF document text
- http://aksaaydinlatma.com/img/editor/image/file/21227538763.pdfIn PDF document text
- https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/465c6e6391dcf2fe7ca501d8744ab523/junifawid.pdfIn PDF document text
- http://agro-vostok.ru/userfiles/file/71878322591.pdfIn PDF document text
- http://cen7dias.es/userfiles/files/minepekuvu.pdfIn PDF document text
- https://hunde-katzen.at/soubory/fuvamagiwuralobomopafigef.pdfIn PDF document text
- https://actorconseil.com/files/file/derotane.pdfIn PDF document text
- http://guilfordvikingsclassof81.com/clients/4/47/479b0a304b4cdce99dfe3eda73a59016/File/73035811851.pdfIn PDF document text
- http://2446665a.ru/ckfinder/userfiles/files/89576458910.pdfIn PDF document text
- http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6b7d81ddd---kekarowokix.pdfIn PDF document text
- https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/85d1a93ccc3260f79619f44409d9d078/11671340440.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_off0000bdb5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBDB5	17556 bytes
SHA-256: `47be818d35b41df5f5477dc1856a3fe1717416b2583c320553f06b315da1de3e`
`font_01_sfnt_off0000ea22.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA22	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010239.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10239	10488 bytes
SHA-256: `32b44add54132fc9ccda1202a16d4b902d724fc966cbba1d945c2974e24b438e`

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