PDF malware analysis — malicious · e177469056b34958

MALICIOUS

PDF

86.1 KB Created: 2021-09-02 21:18:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 2580ecef971c035536d6250b1473fed1 SHA-1: fcf9df6160240256c49921ffc92f454502bbd0a0 SHA-256: e177469056b3495881232eebe1c0ea728efd992bd86bc6430182810a05932af1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress uploads and other domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms strongly suggests this PDF is part of a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://medvor.ru/uplcv?utm_term=mahalaxmi+calendar+2020+pdf+free+download PDF link annotation
- http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160be0109337df---ropadogizujuzowuve.pdfIn PDF document text
- https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/0f12ebdcf6776fcb58f23de1a424fcc3/jofavenikupupewifisovi.pdfIn PDF document text
- http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160fbb26ac8fe0---9508783349.pdfIn PDF document text
- http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9b0f7de8b4---4042235010.pdfIn PDF document text
- http://zenobiacultura.it/userfiles/file///ribitepimofonome.pdfIn PDF document text
- https://seerupit.dk/assens/file/41722829327.pdfIn PDF document text
- http://saintthomasmonrovia.org/clients/a/a7/a774d5b45fc75aba9c6fcf07501e1e58/File/97840373326.pdfIn PDF document text
- http://fcv-bo.org/data/fcv-bo/userfiles/file/32559144391.pdfIn PDF document text
- https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf21f3e322---74484896440.pdfIn PDF document text
- http://oticonshop.net/ckfinder/userfiles/files/jawudiwabija.pdfIn PDF document text
- https://typeone.com.my/ckfinder/userfiles/files/vatuxopunojenibi.pdfIn PDF document text
- http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c667c13b0be---jamapajubadul.pdfIn PDF document text
- http://salwex.hu/file/midador.pdfIn PDF document text
- https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/sl71enssedcecavb7nmsppeib6/40303378755.pdfIn PDF document text
- http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16071683fe2fec---57400863378.pdfIn PDF document text
- http://xn--xhq021fvrwdth.com/d/files/vegarisezeronukudonaliga.pdfIn PDF document text
- https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/5946252c897f325730f7262504c530f2/95296228227.pdfIn PDF document text
- https://netron.pt/app/webroot/media/files/livuwiwokifomot.pdfIn PDF document text
- https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/0b1b624bfcc5ab8f4275d3cf4b5cc19d/7646382860.pdfIn PDF document text
- https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/96b806a4e0ca1d75bd1b3d8193d6c2ab/sulit.pdfIn PDF document text
- http://www.leposeur.fr/site/upload/ckfinder/files/10050189634.pdfIn PDF document text
- https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/1835f8ee5c52976b9929cf9685efbd11/minezudatadeweb.pdfIn PDF document text
- http://deforma.it/userfiles/files/79228961329.pdfIn PDF document text
- https://hamasataccessories.com/userfiles/files/81095737331.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_off0000ddd5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDDD5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f5e7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5E7	22636 bytes
SHA-256: `cf5cee782dc9bf48f6fc9384771d13d486332fcc3a535b291e46dff89e4a10ec`
`font_02_sfnt_off00013117.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13117	11044 bytes
SHA-256: `130d168befaffbbfc90c4194eed44b5806102dfe4446878d6ef929a95f3e0b80`

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