PDF malware analysis — malicious · d5d23ece795cc5fc

MALICIOUS

PDF

82.0 KB Created: 2021-09-04 12:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: fb5ee1aeb98c8d43eff5763b4d0e7174 SHA-1: 12d03ca1328291f490ae97f85e107cfd5bcc14bf SHA-256: d5d23ece795cc5fc97c0a070f0126536eac2b0d77de09e70409031114d44bb8c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The sample contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ML classifier also returned a high probability of maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa675ac7a29---81792794342.pdf In PDF document text
- http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec9d2ee705---satijor.pdfIn PDF document text
- https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/71e4ju0m19mvflbgngmlu722l0/57559853916.pdfIn PDF document text
- https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/8cc169f092c7584e0c5dda7a02c1d9cc/24149980923.pdfIn PDF document text
- http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/161004b3ad80a2---7385087749.pdfIn PDF document text
- https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16107be72d15ba---kivozaj.pdfIn PDF document text
- http://futimisdev.com/userfiles/file/87578925284.pdfIn PDF document text
- http://canoto.us/Images_upload/files/74954531783.pdfIn PDF document text
- https://spacio.hk/attachment/file/begejerepagijeruzalogilo.pdfIn PDF document text
- http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ffbe025f345---55436170246.pdfIn PDF document text
- http://vrtaspol.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/64447599815.pdfIn PDF document text
- https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/7id0tkj0ibt5trbggga2alvm3d/kepewalitawezifevatafiwa.pdfIn PDF document text
- http://crystal-lamp.ru/uploads/files/37380225719.pdfIn PDF document text
- http://grupposcorcia.it/userfiles/files/jexoruvewimag.pdfIn PDF document text
- https://247christianity.org/fckeditor/userfiles/file/muvonapixajawesofelo1624835508.pdfIn PDF document text
- https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/4p57h20ve60fsitnd47bo0mrnp/9709311398.pdfIn PDF document text
- http://moristas.com/userfiles/files/19189475674.pdfIn PDF document text
- https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/062c49793fc598932b4881dc03d2ba44/milozurozodi.pdfIn PDF document text
- http://sungsam.net/userData/board/file/gilotovise.pdfIn PDF document text
- http://bilmatbasim.com/userfiles/file/73319858890.pdfIn PDF document text
- http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16099113154a5e---63281472444.pdfIn PDF document text
- http://foto-recepty.sk/images/fotky/33192803035.pdfIn PDF document text
- https://retake.dk/ckfinder/userfiles/files/ginijosivumuziluladozo.pdfIn PDF document text
- https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748370d3ff2---kolirokozus.pdfIn PDF document text
- https://lescourailleurs.com/upload/editor/file/wivefogi.pdfIn PDF document text
- https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/fe6cbb31497dfb1f53a84147abd17e5d/66048511666.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=how+to+drive+a+car+uk+manualPDF 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_off0000ddf8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDDF8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f60f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF60F	10700 bytes
SHA-256: `5151b8363334ebf35cb6f24b0bbccfae8a38b15c48196c59b1456efb72ffeb87`
`font_02_sfnt_off00010e91.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E91	16884 bytes
SHA-256: `280266cb852174ee78ea0e0d568fc8ddcb05336f8f73d937ef1b12c2c71178a0`

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