PDF malware analysis — malicious · 3623e33c428ec4a8

MALICIOUS

PDF

133.6 KB Created: 2021-09-03 08:27:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: ca2af460e66f34f386ae808be8729b24 SHA-1: dbb3ee8162b39182942d829826ea218db5742b99 SHA-256: 3623e33c428ec4a8cbe101db15291fb2ee70f0d9cb5e71adf8ed1b4bfb5218de

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it's a link farm on disposable hosting and a fake invoice lure. The embedded URLs point to various domains, suggesting an attempt to redirect users to malicious sites. No scripts were extracted, but the PDF structure and heuristics strongly suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9967

Heuristics 7

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.
Fake invoice / payment lure low SE_INVOICE_LURE

Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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://synerhu.ru/uplcv?utm_term=estados+financieros+consolidados+angel+maria+fierro+martinez+pdf PDF link annotation
- http://progetec.org/userfiles/files/37184262678.pdfIn PDF document text
- https://dnmpaint.com/sdcc/images/file/tewaxukujerigoxab.pdfIn PDF document text
- http://alrehabourhome.com/userfiles/files/1159105581.pdfIn PDF document text
- http://drironcat.com/images/file/rezudixusimiverepewoxem.pdfIn PDF document text
- http://www.lnk-creation.fr/upload/file/pisukoguz.pdfIn PDF document text
- https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/3eh6d9055j3pc9knv2t455p3e0/fafopakujigixape.pdfIn PDF document text
- https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/9899lsjdohplds16rvabb4b88m/dusexabube.pdfIn PDF document text
- https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161038226344b8---xenudonikogavez.pdfIn PDF document text
- http://synfarm.com/upload/files/84834477438.pdfIn PDF document text
- http://nprofit.hk/userfiles/nufefizokirisof.pdfIn PDF document text
- https://easy2ticket.com/upload/files/guwiwudi.pdfIn PDF document text
- http://cheers-gifts.com/userfiles/2593640195.pdfIn PDF document text
- https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/tnjt83pd79sokqt60m3v1j5p0i/89714714087.pdfIn PDF document text
- http://amexeuro.com/an3_Uploads/file/70617279114.pdfIn PDF document text
- https://fototipia.hu/files/files/tonowupuzuv.pdfIn PDF document text
- http://architettorobertafasola.eu/userfiles/files/tepuxit.pdfIn PDF document text
- http://www.aadhar-interior.com/userfiles/file/52336125538.pdfIn PDF document text
- https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/gle7j5r8em8o95k3hrh0o2q0d0/jaduwafiximima.pdfIn PDF document text
- https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/i5isudo9hp5kfkmh728ssngbd0/20894095514.pdfIn PDF document text
- https://marblobathware.com/app/webroot/img/files/24337855600.pdfIn PDF document text
- http://charlotteellisscholarship.com/clients/a/a5/a56794a54ce3a7e2a8fdc514f00cf952/File/kekujisuwidosab.pdfIn PDF document text
- http://xsteelstock.com/d/files/99577523173.pdfIn PDF document text
- http://streetnn.ru/data/upload/ck/files/85040682928.pdfIn PDF document text
- http://www.agenbenangbandung.net/file/8397886904.pdfIn PDF document text
- http://hanhthien.net/uploads/file/23501261823.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_off00019cd9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x19CD9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001b4eb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1B4EB	22428 bytes
SHA-256: `0fa184399a58c3934ae6a5ba4287253bf827c6f4b19c15bee12c8b9de276bf22`
`font_02_sfnt_off0001ede6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1EDE6	11004 bytes
SHA-256: `171d0106339e5a26a722fc4756521d04ef070e8367545583b5c30f49ef3cc2ba`

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