PDF malware analysis — malicious · 2567b970dd5a15c2

MALICIOUS

PDF

87.2 KB Created: 2021-09-16 12:50:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 9bdaee6c33cb07c46cc27b8bc7618be1 SHA-1: 3f56ff7a674cba12078fd8da143abb57cc2bb5b4 SHA-256: 2567b970dd5a15c2e44af0b373620752eb9b7d176db1442b036474e9f3427c61

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple external URIs, indicating malicious intent. The ML classifier and ClamAV detection strongly suggest this is a phishing or malware distribution document. The presence of numerous links on disposable hosting, coupled with UTM parameters, points towards a link farm designed to redirect users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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://infrive.ru/uplcv?utm_term=lightroom+mod+apk+latest+version+2021 PDF link annotation
- https://marblobathware.com/app/webroot/img/files/wonaxadetafemamixoraw.pdfIn PDF document text
- http://tinhdauvietnam.vn/upload/files/6437579649.pdfIn PDF document text
- https://mma-montessori.com/admin/ckfinder/userfiles/files/volelulalu.pdfIn PDF document text
- http://heatherjansch.com/ckfinder/userfiles/files/48847214289.pdfIn PDF document text
- http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/18f3ed6dfdb6436d1bb2ff2140750c6a/lodiz.pdfIn PDF document text
- http://optykglowacki.pl/obrazki/files/64351997513.pdfIn PDF document text
- http://metabolitplus.ru/files/file/jijem.pdfIn PDF document text
- http://pbpharm.com/upload/files/50227148334.pdfIn PDF document text
- http://weorderfood.com/uploads/files/bawupitulagedazebu.pdfIn PDF document text
- http://jyotiacademicpress.org/uploads/file/74184642095.pdfIn PDF document text
- https://chachachat.info/js/ckfinder/userfiles/files/65339266575.pdfIn PDF document text
- http://mauchlineware.com/html/chapelstreet/web/userfiles/files/pasosuzopovenilejol.pdfIn PDF document text
- http://ipllaser.in/uploads/73735143978.pdfIn PDF document text
- https://laurallo.com/ckfinder/userfiles/files/puzenopo.pdfIn PDF document text
- http://ramenhajimetustin.com/uploads/files/latudoramisubu.pdfIn PDF document text
- http://foto-recepty.sk/images/fotky/bewafolebaxawidokisug.pdfIn PDF document text
- https://valkexclusief.reviewz.eu/app/webroot/files/userfiles/files/vusogutabaludosukufakemod.pdfIn PDF document text
- http://tylincms.com/userfiles/files/vewewosuvivejowirefavepu.pdfIn PDF document text
- http://sochi-vitrazhi.ru/ckfinder/userfiles/files/rovazitafopimiga.pdfIn PDF document text
- https://bluetact.com/ckfinder/userfiles/files/nopewofudokowiwetik.pdfIn PDF document text
- http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/29928527401.pdfIn PDF document text
- http://cana.vn/uploads/userfiles/file/91598582707.pdfIn PDF document text
- http://namlinhchisapa.com/userfiles/image/file/23894186284.pdfIn PDF document text
- http://anhbanglaw.com/userfiles/file/pegeborenufokixigazopafab.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_off0000e957.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE957	19776 bytes
SHA-256: `127396c8cf02836209fb3bf8c7f723aaf7d889dc08033d84e11c9c37c99c016b`
`font_01_sfnt_off00011cca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11CCA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000134e1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x134E1	11248 bytes
SHA-256: `917f76a3016f2a2d79ff97f738a74ddcc6b0ff13679c4f334aebf4289f1e4ea5`

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