PDF malware analysis — malicious · 283676945a364c1a

MALICIOUS

PDF

89.2 KB Created: 2021-07-25 18:36:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: d214b357c442aa9a4dd9a0e2641f1377 SHA-1: eb87e24a226ce156d35cace832e376ec779f10e6 SHA-256: 283676945a364c1a79c70407d80c15509147f7475958c104bb624a4bb7b9d3a9

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. Heuristics identified it as a link farm pointing to multiple compromised WordPress upload directories, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to lure users to external, potentially harmful, sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9972

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 https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/c4446d8afe6e2ad95cc8a4c69c1fd9dd/94557514328.pdf In PDF document text
- http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091b7682d2cd---13087660423.pdfIn PDF document text
- http://broadgatecapital.com/userfiles/file/90267322886.pdfIn PDF document text
- https://shopinhome.com/ci/userfiles/files/lojurijemipupuwekeso.pdfIn PDF document text
- https://aradovan.com/userfiles/file/2085302923.pdfIn PDF document text
- http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b1cedc7b9---19726597355.pdfIn PDF document text
- https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/m4t04sqhqk52e1l39osh7q0nj7/penidolesidi.pdfIn PDF document text
- https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/638e9bcee76316ac64c3e52d57e1d2ad/xoxat.pdfIn PDF document text
- http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c75d30a59b---parisizifokugupinanenemam.pdfIn PDF document text
- http://beateromer.com/bilder/file/71273518856.pdfIn PDF document text
- https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1584f45878---9127700155.pdfIn PDF document text
- https://master.plus/wp-content/plugins/super-forms/uploads/php/files/c8b779107a4e9ccfd86fa03ba747727d/xisowolax.pdfIn PDF document text
- https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5944814e7f---7045952554.pdfIn PDF document text
- http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4a4887bf20---duxafatoludotororimujax.pdfIn PDF document text
- https://unosms.us/userfiles/file/xizisizejeniwusosamuzeto.pdfIn PDF document text
- http://doer-sh.com/Uploadfiles/files/rixur.pdfIn PDF document text
- http://robbinsfamilyhealthcare.com/clients/2/2c/2c787fa606fc56c3a3a24dfc5409695f/File/xuxasaseparirelu.pdfIn PDF document text
- http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086216ee00ee---3487473551.pdfIn PDF document text
- https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/jaupqr84hlgepoo6322204tfn2/46689213793.pdfIn PDF document text
- https://telewebmarketing.com/FCKeditor/file/nujigamamuf.pdfIn PDF document text
- https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/6fb7a0a6b068c63a0e365c2d49ca8cf5/45714329645.pdfIn PDF document text
- https://landbondcorten.com/attachment/file/32ec7451fd2eace4bbb730a73cc511d3.pdfIn PDF document text
- https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b7fe53e7f6c---sugozilaminug.pdfIn PDF document text
- https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b21a10fd2c---jivowitunexapexufiz.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=sample+size+calculator+online+using+prevalencePDF 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_off0000f763.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF763	11016 bytes
SHA-256: `e248e1eb03e6028922f134520b804ad7c4385d8b9568af6ff80a6f4b881f5b8d`
`font_01_sfnt_off00011109.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11109	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001291b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1291B	16948 bytes
SHA-256: `9bf332c2d76647000a8f8af34d305f3b2ff246b02ac3c7516541709af36fa394`

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