PDF malware analysis — malicious · d7a6a151ff85c391

MALICIOUS

PDF

68.1 KB Created: 2021-09-30 10:08:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 667ab9fb44d3e09cf9bc7c564290e7ad SHA-1: 9ddef9de852dd3f51b26096b01b47a7b0bbf958d SHA-256: d7a6a151ff85c391c1a23789bbc63ee6b2477de7aa7e00e50b5448fea90e7b12

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, with numerous embedded URLs pointing to external sites, some of which are hosted on compromised WordPress installations. This suggests a phishing or malware distribution scheme, where the PDF serves as a lure to redirect users to potentially harmful content.

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 https://on-call-anatomist.org/ckfinder/userfiles/files/12428056706.pdf In PDF document text
- http://biosystech.com/pdsFck/file/34756392865.pdfIn PDF document text
- https://nic-irq.com/userfiles/files/mefasob.pdfIn PDF document text
- https://miltonmattox.com/userfiles/file/33243745897.pdfIn PDF document text
- http://antonellascarpittadesigner.it/userfiles/files/jemidajelexilojevapo.pdfIn PDF document text
- https://thehealerspoint.in/admin/userfiles/file/xotibulitu.pdfIn PDF document text
- http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16136fd47a5b07---gozowipavebomasowotowuv.pdfIn PDF document text
- https://hanakspotrebice.cz/eshop/ckfinder/userfiles/files/92403429954.pdfIn PDF document text
- https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/413cbcea153075371955f9b8482b78e4/79428447596.pdfIn PDF document text
- https://songhong-thudo.com/img/files/23175951783.pdfIn PDF document text
- https://nbc.com.vn/ckfinder/userfiles/files/21345060462.pdfIn PDF document text
- http://oris-am.com/editor_up/99098005725.pdfIn PDF document text
- http://i-harmonics.com/upload/files/90648729231.pdfIn PDF document text
- https://yennenga.org/business_school/uploads/file/12531095864.pdfIn PDF document text
- http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/73e5d899be8dfac12a10627c3a4a2d7f/dosuli.pdfIn PDF document text
- https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/2e84eca0fcd7670dfc17c16d644e221a/70910170937.pdfIn PDF document text
- https://webmakler.org/userfiles/file/dulobudete.pdfIn PDF document text
- https://masini-de-ambalat.ro/images/userfiles/zobegexofosik.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=android+ps+nowPDF 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_off0000a9b9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA9B9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000c1d0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC1D0	10012 bytes
SHA-256: `0bb45d8966d1038b12e2dc157243215fffc8a54cf87095af825f276274830302`
`font_02_sfnt_off0000d822.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD822	16796 bytes
SHA-256: `97ab4d0d9609b604a69b2dc1914f49c1e0c2ae72b100d8cfcb1384d853513054`

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