PDF malware analysis — malicious · 6f842b353ea3c046

MALICIOUS

PDF

73.7 KB Created: 2021-06-28 08:32:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: a8c6713f1283ca3d8779477704982b83 SHA-1: fac1552cec816054d797aa213afa2fb06a0f2ffa SHA-256: 6f842b353ea3c046105f730bd83a5512ff5992c7d35359b87d1ad5f337b99810

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, but the heuristic findings strongly suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9965

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 https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160766b5dccd7b---beninojadaju.pdf In PDF document text
- http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/e6emp1iilm2le7fm7neansem4k/95649073854.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ecd9be870---kanibizilutuwuvipenusa.pdfIn PDF document text
- http://envigest.cz/upload/file/41195956020.pdfIn PDF document text
- https://shoppingplanet.ro/ckfinder/userfiles/files/51621824800.pdfIn PDF document text
- https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/be59d0f3ca36e6e0925cdf9698ea67db/pexafosuginusi.pdfIn PDF document text
- http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b00686862---65962149829.pdfIn PDF document text
- https://atamergranit.com/userfiles/file/nopejizewiwixomamerutix.pdfIn PDF document text
- http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/159a8c9854c0e68781fdd3e225b5b3d0/67070396303.pdfIn PDF document text
- http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607d03be56704---19602837316.pdfIn PDF document text
- https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/5222112fb9d4e8c1dde9f5b3d85c1443/11128981503.pdfIn PDF document text
- https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091f1bd121b1---55577400683.pdfIn PDF document text
- https://ms02bet.com/contents//files/vukuve.pdfIn PDF document text
- https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eb32e72698---tevaxemutetud.pdfIn PDF document text
- http://staresecurity.com/userfiles/file/35129389978.pdfIn PDF document text
- http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d327c6eee2---zirejabuloti.pdfIn PDF document text
- http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/2999043c6f414455d494dc66d4088a57/guxijofuzur.pdfIn PDF document text
- http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16088389f9f0a7---bisulip.pdfIn PDF document text
- https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/110bac4375f901fca65ae6b1783c3469/5220023072.pdfIn PDF document text
- https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/f9774a11f06895b54de9e0827e301c34/sakevofesirudamesitupo.pdfIn PDF document text
- https://lederstuehle-shop.de/ckfinder/userfiles/files/89558140163.pdfIn PDF document text
- http://alnoorcity.com/userfiles/file/7595077641.pdfIn PDF document text
- http://uci.ir/userfiles/file/66816957816.pdfIn PDF document text
- https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/25ef33e6da9fdf39b0df85e71b096692/piwigaxeke.pdfIn PDF document text
- https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/737a296a09813f64c0dd790efeedd57d/78651656731.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=george+mcgovern+middle+schoolPDF 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_off0000bfbf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBFBF	10664 bytes
SHA-256: `990e1e262caaf584e37eb98f695bd61c1a825095b11c551b00f6746e044452e8`
`font_01_sfnt_off0000d7bd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD7BD	16116 bytes
SHA-256: `83e45bc6cf6a9cb1fc4b75759874f8303af933d64eca5a4fbbe27dfeabdb8263`
`font_02_sfnt_off00010171.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10171	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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