PDF malware analysis — malicious · 5ed781850c5e0be6

MALICIOUS

PDF

68.4 KB Created: 2021-09-03 01:33:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: a2654198aadca5eb547e7ab82e24ae7a SHA-1: 303b3d2671baf726ff665d3de5230c5a1182b5b9 SHA-256: 5ed781850c5e0be690b2b74827a23d5eb8df2449774e1e4336998f919c4fa589

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which point to compromised CMS uploads and disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the structure and URL patterns are indicative of a phishing lure or a downloader for a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

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 http://al-bandak.com/userfiles/file/78125320651.pdf In PDF document text
- https://cafesca.com/ckfinder/userfiles/files/mimatafixilisemojimutawo.pdfIn PDF document text
- https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2807632127---14483193776.pdfIn PDF document text
- https://miguktour.com/FileData/ckfinder/files/20210623_2B8806F694CBF96D.pdfIn PDF document text
- https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bed13386c7---lisekadipilakim.pdfIn PDF document text
- https://sahyadrisevasanstha.in/userfiles/file/jobut.pdfIn PDF document text
- http://srividyaastrology.com/userfiles/file/doxaseduz.pdfIn PDF document text
- http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/34a45720eeaa2f860940b355a9fb30a1/jaxirazobozasorugijunuri.pdfIn PDF document text
- https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aca0065c180---65750344186.pdfIn PDF document text
- https://www.willmarshelter.com/ckfinder/userfiles/files/76901408019.pdfIn PDF document text
- http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/8ee83d816f89c57ff38b4c5630cd87ae/xazakibivolewomorusixip.pdfIn PDF document text
- http://kxqcgs.net/filespath/files/20210822060033.pdfIn PDF document text
- https://ssmahavidyalaya.org/lion/uploadedfiles/fck/files/file/mulebabute.pdfIn PDF document text
- http://kotolantopeni.cz/file/pomuduzekolar.pdfIn PDF document text
- http://twxcd.com/img-aim/files/85781357410.pdfIn PDF document text
- http://debnine.net/UserFiles/File/jatamamax.pdfIn PDF document text
- http://aptatravel.com/clients/4/48/489dad2d2d8436d4c085fc0ccdc2d1b3/File/zopipi.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=convert+pdf+to+kindle+paperwhite+onlinePDF 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_off0000ab6d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAB6D	15664 bytes
SHA-256: `0ee538c0ff3116fa89f48cd701b5fc29dcc5d28a7eaa098e63e36f4c465ecc93`
`font_01_sfnt_off0000d37b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD37B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000eb92.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB92	10704 bytes
SHA-256: `73eb1313a2bd6ba4b08eada954188381bc203f7c30d0d3daf525990c9ec92238`

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