PDF malware analysis — malicious · 1daea8b5110ba4ab

MALICIOUS

PDF

80.4 KB Created: 2021-09-12 15:43:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24

MD5: ef994ff97a00d5dfaca9a83de9580368 SHA-1: 43a53d359699141f4249793fe4a867f1886a6557 SHA-256: 1daea8b5110ba4ab08294a516d118b36f5244529c8426a275929b3cb4c048e01

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a social engineering tactic, specifically a browser extension installation lure, to trick users into compromising their systems. The document contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the download and execution of a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE

Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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://philabc.ru/uplcv?utm_term=fingerprint+password+for+android PDF link annotation
- http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136861e33aff---tarevafarosa.pdfIn PDF document text
- http://agro-partner.com/Image/files/12247262856.pdfIn PDF document text
- http://shinies.ru/img/lib/file/4709930169.pdfIn PDF document text
- https://jmbarrenetxea.soinuenea.eus/files/galeria/files/48740595865.pdfIn PDF document text
- http://marketingnews.fr/images/file/kinikinojowawijagepezara.pdfIn PDF document text
- http://24horasnoar.com.br/ckfinder/userfiles/files/54665275696.pdfIn PDF document text
- http://valentine.tutaylamhet.com/storage/ckfinder/files/bigobufidojixamanizu.pdfIn PDF document text
- https://sunpower.lv/ckfinder/userfiles/files/7785057898.pdfIn PDF document text
- http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec6be64f65---83026929189.pdfIn PDF document text
- http://aarogyamedico.com/userfiles/file/xufubevobobubub.pdfIn PDF document text
- https://12shio2.com/contents/files/2522935391.pdfIn PDF document text
- https://sunsoftinfoway.net/ckfinder/userfiles/files/fupego.pdfIn PDF document text
- https://keongracun.org/contents/files/xaxavivamosabajuniwojege.pdfIn PDF document text
- http://gattoneva.pl/pages/userfiles/file/90919081260.pdfIn PDF document text
- http://zagazzo.com/userfiles/file/febitirabuwirukodozik.pdfIn PDF document text
- http://ipsaix.com/ckeditor/ckfinder/userfiles/files/96877204178.pdfIn PDF document text
- http://zeci.nl/im/image/dosabativu.pdfIn PDF document text
- https://sportsht.com/userfiles/file/zuxuzafumubakevibuxuzaj.pdfIn PDF document text
- https://www.larche-de-jules.fr/ckfinder/userfiles/files/sakawena.pdfIn PDF document text
- http://wsm.hk/images/files/tasadisixosubozokepodiku.pdfIn PDF document text
- https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/161339d498238a---vogofofovazezutomarikezit.pdfIn PDF document text
- http://sriagasthiyarastro.com/FCKeditor/userfiles/file/19318897353.pdfIn PDF document text
- http://diskacme.dk/images/upload/file/46423467334.pdfIn PDF document text
- https://strategieb2b.com/userfiles/file/bojotajipekapuzit.pdfIn PDF document text
- https://soechi.id/userfiles/file/lapafosejezexexi.pdfIn PDF document text
- 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_off0000d190.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD190	10692 bytes
SHA-256: `a23037ac8c0eb0fa2100c7d997896e292644ee143c162073e5ee58ce09443e03`
`font_01_sfnt_off0000ea0c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA0C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001021e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1021E	19048 bytes
SHA-256: `6c9f9f7b0c7b500372d6d8a409fc80119eca2e19c3c5815ddaeff42f985edf0a`

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