PDF malware analysis — malicious · cc9955602d9ab8cc

MALICIOUS

PDF

73.0 KB Created: 2021-10-01 11:19:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23

MD5: d9e00ed5ae671d1b0564cbd63e263467 SHA-1: 0f3ef7ee4e459116c62215a14504898810b066b3 SHA-256: cc9955602d9ab8cc45250503b12c43b6b57b00f8b627de96e41482d7836def85

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as a link farm, indicating a likely attempt to redirect users to malicious sites for phishing or malware delivery. No scripts were extracted from this sample.

Machine Learning

Nyx PDF Classifier malicious score 0.9976

Heuristics 5

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.
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://homestationrealty.com/userfiles/files/vuripi.pdf In PDF document text
- http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16155ef0c79f53---42194509076.pdfIn PDF document text
- https://yogaspotny.com/userfiles/file/1517003236.pdfIn PDF document text
- http://haki.vn/uploads/files/29787681801.pdfIn PDF document text
- http://travelspace.pl/userfiles/file/48326102271.pdfIn PDF document text
- http://azizavacanze.com/userfiles/files/nufama.pdfIn PDF document text
- http://cwesp.biz/upload/file/34012512934.pdfIn PDF document text
- http://aelma.com/sites/default/userfiles/file/rirowekiteb.pdfIn PDF document text
- https://ferropula.hr/files/vagitexemugukejujewif.pdfIn PDF document text
- https://bharatbiodiesel.com/userfiles/file/vifumikipapakugoxe.pdfIn PDF document text
- https://a1-recruitment.fr/v2011/Files/fck_upload/file/butoselubunufodi.pdfIn PDF document text
- https://hamasataccessories.com/userfiles/files/5792601495.pdfIn PDF document text
- https://ruedi-leuthold.com/userfiles/files/56078054500.pdfIn PDF document text
- https://vildmarksjagt.dk/userfiles/file/likexitupenovanuzus.pdfIn PDF document text
- https://n-vv.dk/userfiles/file/naputopemidoviboli.pdfIn PDF document text
- https://ichapps.peaceofworld.com/ichapps/ckeditor-ckfinder-integration/uploads/files/24805334571.pdfIn PDF document text
- http://studiotecnicoligioni.com/userfiles/files/didikobatogegupe.pdfIn PDF document text
- https://familienbilstrup.dk/ckfinder/userfiles/files/komilunolomazofunuv.pdfIn PDF document text
- https://knurussian.kr/DATA/upload/files/202109302316201544.pdfIn PDF document text
- http://studiofranzoni.eu/userfiles/files/dajaxosigutegof.pdfIn PDF document text
- https://bvphcn.bdata.vn/upload/files/zolifubomup.pdfIn PDF document text
- https://praktijk.zorglink.nl/ckfinder/userfiles/files/nalubejepiwikapu.pdfIn PDF document text
- https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614fab30a9f83---58822735855.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=pokemon+white+2+nds+romPDF 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_off0000b560.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB560	10604 bytes
SHA-256: `4fe3fdd77ceff82f64b21289ea1f2cda8d627f018ef3d0855a3a6f48ecc72237`
`font_01_sfnt_off0000cd8b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCD8B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000e59d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE59D	18648 bytes
SHA-256: `ae148dbf3a977dc1d96de061e801db559093110467aeb1deb50e8048483b5c96`

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