PDF malware analysis — malicious · fb6d44457ed292fc

MALICIOUS

PDF

90.3 KB Created: 2021-08-25 11:04:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: e93a0841f5ef6992055b553565b2f572 SHA-1: 4d0f24ea49d8bc224fe23b00944dd306bd0ffe05 SHA-256: fb6d44457ed292fc095e0ece8593cd805ad41ec943a43d5b6f4ea72e590adb27

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier strongly flagged this PDF as malicious. The primary purpose appears to be directing users to potentially harmful external content, consistent with phishing or malware distribution tactics.

Machine Learning

Nyx PDF Classifier malicious score 0.9913

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.
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://chcial.ru/uplcv?utm_term=willow+wind+labradors PDF link annotation
- http://xn--rssx31a7tec6p.com/upload/userfiles/files/20210816115432.pdfIn PDF document text
- http://club-integra.ru/userfiles/file/jurewujufegapikulelobep.pdfIn PDF document text
- http://mwflower.com/upimagesfile///lizodinovojima.pdfIn PDF document text
- https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0033e82f4a---48470279856.pdfIn PDF document text
- https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/dac3dcf4311891ce3ba0a860c9e59c81/2548641516.pdfIn PDF document text
- http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607212e7b9212---mubijekuboritepudug.pdfIn PDF document text
- https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c94062152f0---35725368785.pdfIn PDF document text
- https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/db453a25ef296ca5c6be83dd51cd2946/98922141483.pdfIn PDF document text
- https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/161215b69269a4---83701766514.pdfIn PDF document text
- http://worldnaturalfood.com/image/upload/File/85117490590.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160875344b1c06---29408107473.pdfIn PDF document text
- http://maslag.eu/userfiles/file/napanewuwuzu.pdfIn PDF document text
- http://mygotour.com/FileData/ckfinder/files/20210728_42E4D49B0B6B9E1B.pdfIn PDF document text
- http://feynburg-uhren.de/uploads/wotuxo.pdfIn PDF document text
- https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/f02516b2f81fffb12406af269c2b1ce6/dozuguw.pdfIn PDF document text
- http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/v9kmr7ab9ll7j8ol9nqmmbe6i0/55810350877.pdfIn PDF document text
- http://zonweringbelgie.be/ckfinder/userfiles/files/32575929794.pdfIn PDF document text
- https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/c50f40d630e2153d7837656e809ab966/23376192898.pdfIn PDF document text
- http://pamat.ro/UserFiles/file/7697555379.pdfIn PDF document text
- http://brickchamber.com/ckfinder/userfiles/files/18369809087.pdfIn PDF document text
- https://coolinterier.sk/upload/files/metudofera.pdfIn PDF document text
- http://flatadministration.com/uploades/fckeditorfile/lenexepugul.pdfIn PDF document text
- http://cleanyachts.it/writable/public/userfiles/file/37243362363.pdfIn PDF document text
- http://scro.ru/pic/file/lomilavidetinibogusara.pdfIn PDF document text
- https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a2526f2142e---24652844062.pdfIn PDF document text
- https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e71d740c2f9---92863434713.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_off0000fcef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCEF	17536 bytes
SHA-256: `12c1bc2780764277abd6e357f5caedf0a93ab6a6f7bfc24e293aca644e9f21b4`
`font_01_sfnt_off00012b0d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B0D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00014324.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14324	10228 bytes
SHA-256: `8c4239f36175478a96fd9e8d565908dd7ab4f19fdb1c042155b29ae30c58af03`

Open this report in the interactive analyzer, or submit your own file for analysis.