PDF malware analysis — malicious · 8b01e52b315d8f09

MALICIOUS

PDF

72.6 KB Created: 2021-09-25 23:12:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: f3125b9c720478dbfb30394e615955ba SHA-1: 097ad1c64f9b8b92021336b0d7f3f63a4091a2c0 SHA-256: 8b01e52b315d8f0973631e7d1cfe2f73cdfc03813c411440b03a2c4b2997d301

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable hosting, indicative of a link farm designed to distribute malicious content or phish for credentials. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to exploit kits or phishing sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

Heuristics 5

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://allytemp.ru/uplcv?utm_term=play+store+online+game+download PDF link annotation
- http://phdpecs.hu/userfiles/files/68988631298.pdfIn PDF document text
- https://asoriofrio.org/ckfinder/userfiles/files/totozoxigagexefo.pdfIn PDF document text
- http://twtime.com/uploads/files/202109182244349167.pdfIn PDF document text
- http://fatimaartwork.com/userfiles/file/mofipulopuda.pdfIn PDF document text
- http://thegioixedap.net/upload/files/vebizitupanalasapu.pdfIn PDF document text
- http://decoworld.in/dayafter/uploadimages/newsimages/file/84033405310.pdfIn PDF document text
- https://rosedreamholidayhomes.com/ckfinder/userfiles/files/zojumijen.pdfIn PDF document text
- http://4bx.pl/public/file/35130841941.pdfIn PDF document text
- http://anapro.com/ckfinder/userfiles/files/35869654573.pdfIn PDF document text
- http://bualuang101.com/backoffice/upload/files/fugisanepoxefutameb.pdfIn PDF document text
- https://fengshan-zhennangong.org/upload/ckfinder/files/32712091839.pdfIn PDF document text
- https://www.la-melodie-des-saveurs.fr/ckfinder/userfiles/files/77470152429.pdfIn PDF document text
- https://ermolino.mebel18.com/uploads/files/8358976491.pdfIn PDF document text
- http://1666-3668.com/attach/userfiles/file/50961056881.pdfIn PDF document text
- http://wahluenfty.com/userfiles/95505783861.pdfIn PDF document text
- https://dimensionshoppe.com/alpha/ckfinder/userfiles/files/wusinomulekusezilev.pdfIn PDF document text
- http://jr.ac.th/ckfinder/userfiles/files/13247675407.pdfIn PDF document text
- http://sentezetutmerkezi.com/upload/ckfinder/files/40043770857.pdfIn PDF document text
- https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/161322e20e438f---2066745411.pdfIn PDF document text
- http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161304a0505ba5---boxapebubevonak.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_off0000b62e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB62E	17852 bytes
SHA-256: `602e78954eee2752dc976d90be99e9fbd07bc0008710b3bb3bf1d4e460f84c1a`
`font_01_sfnt_off0000e432.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE432	10792 bytes
SHA-256: `76285f4ce88612311ec54a89ddada13ade8678661702365bc739343b220302be`
`font_02_sfnt_off0000fcf2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCF2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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