PDF malware analysis — malicious · 0f888d64aaabbb8a

MALICIOUS

PDF

98.1 KB Created: 2021-07-06 21:53:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 6b01c848e62bbe54886805246bed732a SHA-1: 7a224ec1eda1198cf1adf47adf8667364397b605 SHA-256: 0f888d64aaabbb8a2287cc3670d99b1962ad009495cb10d057890948169bebe8

172 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document contains numerous links pointing to compromised WordPress sites, suggesting it is part of a link farm designed to distribute malware or facilitate phishing. The presence of embedded URLs and the overall structure indicate an attempt to trick the user into downloading a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9918

Heuristics 8

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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d899cc219---34016332566.pdf In PDF document text
- https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/b7f5d668608d1ddce6ac5d042e813158/xojofoperejifutaduz.pdfIn PDF document text
- https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/ds6p53brlv9i10kv2h12d63jt4/lolilupedosa.pdfIn PDF document text
- http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b57c9cc24---fevogopiwofexodemekiruzun.pdfIn PDF document text
- http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a05b27b4c---75692944781.pdfIn PDF document text
- http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160723b68087a9---vawirenedozub.pdfIn PDF document text
- https://lotte-ppta.com/beta/assets/file/76218361700.pdfIn PDF document text
- http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c6bc885851c---bedexov.pdfIn PDF document text
- http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077c8fc0e8ab---18055251346.pdfIn PDF document text
- http://calisnt.com/uploads/files/78471397471.pdfIn PDF document text
- http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbb4e0be66a---gasuduziguriraxeladumil.pdfIn PDF document text
- https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/0u1iimadv2um6dtf9ic0heunof/darapuguxokigabofisixiki.pdfIn PDF document text
- https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/59025c7c29f8ecb03b3fdf79b672c0ef/vaxebijetizuxoxoxe.pdfIn PDF document text
- http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607263e5c0a2c---43858642516.pdfIn PDF document text
- http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4746e0608---xafikaxino.pdfIn PDF document text
- https://canevastoilestjean.com/upload/editor/file/19466683949.pdfIn PDF document text
- http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/c89942d1bb2819f22f12b4c068f67a24/raperodesi.pdfIn PDF document text
- http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b2265e5593f---fitesipifesomugaranave.pdfIn PDF document text
- https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/20ac5a71d3abebbaf613ee68de805bf8/26464144438.pdfIn PDF document text
- https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a711133cdf4---tuzesoravojiradopikida.pdfIn PDF document text
- https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/f305b92cab041763c0c87d6494fdaef7/25676017120.pdfIn PDF document text
- https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/rvmk8r1cp0hshrh4i3nd39n7sg/luvumolelanewewiwi.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=merge+dragons+how+to+get+dragon+powerPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fd81.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD81	26348 bytes
SHA-256: `727b5c4a18e8ef4e05e9fb6c2ff8d07fdd790239ac3351dd52c92b68d99894d2`
`font_01_sfnt_off00013500.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13500	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00014d11.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14D11	16164 bytes
SHA-256: `fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467`
`font_03_sfnt_off00016288.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16288	10612 bytes
SHA-256: `8a0493db00bf3eab89040239af392f6d30a29525fef5bb028ba9f3bd467b42e3`

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