PDF malware analysis — malicious · daa3a1ad2bf82e3c

MALICIOUS

PDF

79.8 KB Created: 2021-09-27 21:06:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: 7cc046e43a3e716c853d74ec9538a2af SHA-1: a4493bc61c2f6523e33e634b9985faa7c80fc91c SHA-256: daa3a1ad2bf82e3c56b1110485e052d437f03b6e384130716070654ba856bfc5

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs pointing to disposable hosting, indicative of a phishing or malware distribution scheme. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggests an attempt to obscure malicious links or host malicious content. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://foulardfotografando.it/file/74425829835.pdf In PDF document text
- http://grandinhr.eu/images/user/file/saxesu.pdfIn PDF document text
- https://dellrein.ru/content/file/mixidimasinuberexoj.pdfIn PDF document text
- http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cb86a23bb1---94837405773.pdfIn PDF document text
- https://fullgame.hu/uploads/files/ripixugezoluladubokif.pdfIn PDF document text
- https://factorysales.com/userfiles/files/tivilenuvanar.pdfIn PDF document text
- http://hanilkwanla.com/uploads/files/vofizosinaxedamozazi.pdfIn PDF document text
- http://alhambra.kopanramen.com/uploads/files/93938334688.pdfIn PDF document text
- http://romanasulcikova.cz/userfiles/2253809346.pdfIn PDF document text
- http://refah4ter.info/basefile/hotelrefah4terir/files/faborazile.pdfIn PDF document text
- https://przygodanaukrainie.pl/admin/ckfinder/userfiles/files/vegugilagorekuroweg.pdfIn PDF document text
- https://elsadaulte.com/ckfinder/userfiles/files/logojepojoza.pdfIn PDF document text
- https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146b2fa50229---dototuxatakapos.pdfIn PDF document text
- http://fmdscu.net/userfiles/file/pulazevikemopoxopuli.pdfIn PDF document text
- https://hidropomp2008.com/uploads/userfiles/file/26874861990.pdfIn PDF document text
- http://leadershipcareer.kr/fckeditor/_upload/file/46554606452.pdfIn PDF document text
- http://geluidsadviesnederland.nl/ckfinder/userfiles/files/98776911477.pdfIn PDF document text
- http://serramentisiciliano.it/userfiles/files/37009872121.pdfIn PDF document text
- http://bursaceyizgelinlik.com/images_upload/files/samifovosizadi.pdfIn PDF document text
- http://parbatsamajjapan.com/img/files/files/bezixofijexovawe.pdfIn PDF document text
- http://hotspot-usa.com/js/upload/files/82714560559.pdfIn PDF document text
- http://nelly-design.ru/upload/files/ruvezorutobesozigokaxuru.pdfIn PDF document text
- http://lingeriedediva.com/UploadFile/file/2021090717541973499.pdfIn PDF document text
- http://comitatoamiantovelodromo.org/userfiles/file/pejomajeg.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=pc+creator+pro+apk+downloadPDF 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_off0000c73f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC73F	22208 bytes
SHA-256: `f2b13502ef097bc2495e9732e4c0ed83e8deb9229003c4758e39995355deb7d5`
`font_01_sfnt_off000101b0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x101B0	10424 bytes
SHA-256: `da5f1fe15a538af773b9b237920f4a615f7490ed4adaa38cd412acae71f18c10`
`font_02_sfnt_off00011980.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11980	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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