PDF malware analysis — malicious · d0207bac2b51672e

MALICIOUS

PDF

84.5 KB Created: 2021-09-06 09:27:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: b4fe0342652045020b3b02ec0eec3230 SHA-1: 585b2d6b6e5ee0f45fd2287feb4c23615a63216d SHA-256: d0207bac2b51672efb7e2ebfb6638a3a3bf415b292dadf5b1706e427eab6e80d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of these links suggests an attempt to distribute malware or conduct phishing attacks.

Machine Learning

Nyx PDF Classifier malicious score 0.9860

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 http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b4cd47c427f---890573318.pdf In PDF document text
- http://spreewaldatelier.de/img/editor/file/fegubir.pdfIn PDF document text
- https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/c80027b32e6a9beee751a9cd73e7265d/xogigasivebojapena.pdfIn PDF document text
- https://hargagila.com/uploads/image/files/vovulupelukiredipuledeful.pdfIn PDF document text
- http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/198434c5deffc0b4026f1d54b594135c/xojuvajeso.pdfIn PDF document text
- https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/o0sa0q2ohp53g9aqn5ks913md4/wagorizan.pdfIn PDF document text
- https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/a9fa29db100fc880efc54cbe5c9b79a0/vesoxu.pdfIn PDF document text
- http://debeight.net/UserFiles/File/80248332468.pdfIn PDF document text
- https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/7cd4b4e4fbd828efdb29284554b04bd8/musefosos.pdfIn PDF document text
- http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5ca8db627---77305969899.pdfIn PDF document text
- https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/7641osigl0t57c2aaoc2ko8tdc/naxavitivejedaji.pdfIn PDF document text
- http://serramentisiciliano.it/userfiles/files/kasabovamorise.pdfIn PDF document text
- https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/f913b6b17153e15214bb64d90e0c1495/2548805268.pdfIn PDF document text
- http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/c5dh8cnn3m7hb2ll6f370t11s1/zuzakejaza.pdfIn PDF document text
- http://www.mustwalge.ee/data/content/files/3601538242.pdfIn PDF document text
- http://prabashproperties.com/ckfinder/userfiles/files/52910092210.pdfIn PDF document text
- https://jeanmarcrobion.fr/userfiles/file/rotikifakojiv.pdfIn PDF document text
- https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160dbfc913889b---15115852503.pdfIn PDF document text
- http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0c041e499---43721871435.pdfIn PDF document text
- http://crosswaysrecruitment.com/userfiles/file/kimerovovalerog.pdfIn PDF document text
- http://devison-matras.com/upload/file/57217102937.pdfIn PDF document text
- http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f3c1f1ec0de---14969651371.pdfIn PDF document text
- http://fullcolorspandoeken.nl/userfiles/file/6697450452.pdfIn PDF document text
- https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/e1baf9c60209373654b28c523a8d2eb5/dudas.pdfIn PDF document text
- http://arunimaflavours.com/userfiles/file/44008125394.pdfIn PDF document text
- https://viettincapital.vn/upload/files/38068670952.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=grade+10+chemistry+questions+and+answers+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_off0000e2e5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE2E5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000faf7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFAF7	17704 bytes
SHA-256: `bbe5b606d9ad311a0c635244ba8933d2b45d98c910dc670bb8064c7835a44c8a`
`font_02_sfnt_off00012920.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12920	11496 bytes
SHA-256: `315a2b31004cdd4457d3383cedd88f1d743455e7b78a4cbaa0ce9d2b2b629bd9`

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