PDF malware analysis — malicious · 248bee32f6ba4a91

MALICIOUS

PDF

72.7 KB Created: 2021-09-03 20:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 3ca8999fa62f4250f643d925320d84ae SHA-1: d88be43ed6cbb9d0e81117d3b6c05370ff652b1d SHA-256: 248bee32f6ba4a918269369c59a67b080ed184352508cc74965a894b6e75262f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely intended to redirect users to malicious sites. The presence of multiple external URIs and a link farm structure strongly suggests an attempt to lure users into clicking through to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9965

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://nonbodepsg.com/uploads/files/vevabagutosoluxona.pdf In PDF document text
- https://delaneyllc.com/ckfinder/userfiles/files/5968306789.pdfIn PDF document text
- https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/31bf6b2e2da9a87441df4889d49bc5f4/zaduji.pdfIn PDF document text
- http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160948d195c389---49334417442.pdfIn PDF document text
- http://gorisum.net/fckeditor/upload_file/file/84692286115.pdfIn PDF document text
- https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/67ff8b12c09968ad16ed627d45c428e7/worinumafegukebefa.pdfIn PDF document text
- https://rmp-familienanzeigen.de/cms/files/3867708656.pdfIn PDF document text
- http://sethhukumchandschool.com/userfiles/file/poxonirub.pdfIn PDF document text
- http://dydlhx.com/upfiles/file///31635819753.pdfIn PDF document text
- http://predit.ru/admin/ckfinder/userfiles/files/sojerilap.pdfIn PDF document text
- http://sampsonancestry.com/clients/d/d9/d9bd9208c4e45de01aa31840e3a8c66b/File/70022614649.pdfIn PDF document text
- https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160caff9d4662b---67525960542.pdfIn PDF document text
- http://www.rotudavid.com/ckfinder/userfiles/files/71726001539.pdfIn PDF document text
- https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/c2c6142098a5835043bfb1238e533e27/dezatuvagezoteget.pdfIn PDF document text
- https://krygina40.ru/UserFiles/File/95638989693.pdfIn PDF document text
- http://md-servicios.com/userfiles/file/pelujokorotunevovajowulow.pdfIn PDF document text
- http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160770114ee7d5---tisazepupuvupoguvomukakez.pdfIn PDF document text
- http://varanini.pl/userfiles/file/vozuralododomotebodabe.pdfIn PDF document text
- https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/3b46e154614b1a4c2255a0abc6e5249f/27209606287.pdfIn PDF document text
- http://atiksigorta.com/files/39449573689.pdfIn PDF document text
- http://www.miyadenthai.com/image/upload/File/wolikerazupugositesegu.pdfIn PDF document text
- https://anukulagrotech.com/userfiles/file/xawiwixekegejitamad.pdfIn PDF document text
- http://wsp.pl/userfiles/file/94679745849.pdfIn PDF document text
- http://norilskgu.ru/userfiles/file/11144046240.pdfIn PDF document text
- https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe191d90bc---kawanose.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=l%E1%BB%8Bch+2020+pdfPDF 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_off0000b46b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB46B	10032 bytes
SHA-256: `e48736179a594bf36b60459a0da94198c2994c086c4432a9a38ec84e91c43356`
`font_01_sfnt_off0000cac8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCAC8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000e2da.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE2DA	19656 bytes
SHA-256: `f2be905e3f7f9baa35e33a505ac0bf2aba5e0c6efc27a33687d3abffce89f035`

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