PDF malware analysis — malicious · e5a48d0a4ad36a1c

MALICIOUS

PDF

75.1 KB Created: 2021-09-12 15:05:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 519dde6c3541511dd3ba68b2c73a766e SHA-1: dba01bde0b93fb185b824194f15a30a6d363fef4 SHA-256: e5a48d0a4ad36a1c8edd5ec5f88097ef331676110b982e0f28641841bed2257a

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. This script likely redirects the user to external URLs, as indicated by the numerous extracted URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9976

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://irlanc.ru/uplcv?utm_term=sqlite+not+null+constraint+failed PDF link annotation
- http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16135dfd3012c5---zusegab.pdfIn PDF document text
- http://mrpennarak.com/user_file/file/daxeloregakojunoxifif.pdfIn PDF document text
- https://whiteplacard.com/UserFiles/file/24709784159.pdfIn PDF document text
- https://31app.com/userfiles/file/pezugevumuzujipotesej.pdfIn PDF document text
- https://guapa2.com/admin/fck/file/3350848328.pdfIn PDF document text
- http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bafasesajilix.pdfIn PDF document text
- http://www.msjcongregation.org/www/js/ckfinder/userfiles/files/16229674105.pdfIn PDF document text
- https://jackinthegymtpe.com/uploads/files/202109091702516756.pdfIn PDF document text
- http://emons-verlag.net/testarea/cwsCMSlight/media/files/48912982962.pdfIn PDF document text
- http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/6535617937.pdfIn PDF document text
- https://apra.pl/files/file/66282121952.pdfIn PDF document text
- http://alrehabourhome.com/userfiles/files/20826359782.pdfIn PDF document text
- https://oncallanatomist.com/ckfinder/userfiles/files/vemovorenafefenudupim.pdfIn PDF document text
- http://baloneacessorios.com/_upload/file///18434300081.pdfIn PDF document text
- http://netcentricnj.com/ckfinder/userfiles/files/lulujuripuvaseratipiz.pdfIn PDF document text
- http://polyacer-ecp.com/userfiles/files/20210905_054938.pdfIn PDF document text
- http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161351fdc2b7f3---lasiromedow.pdfIn PDF document text
- http://xn--80aatg4aaaddkhfhbf3evf.xn--p1ai/ckfinder/userfiles/files/simadetulogelevul.pdfIn PDF document text
- http://dekoblickfang.de/userfiles/file/tulibinijofolatisika.pdfIn PDF document text
- http://mynotary.ca/sites/all/sites/mynotary.ca/files/vajepikukekoluzokowaz.pdfIn PDF document text
- http://tg-focus.ru/userfiles/files/vokegodobijekinejo.pdfIn PDF document text
- https://lifeteacher.tw/uploads/files/202109051507068251.pdfIn PDF document text
- http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1613a23255237d---82094373123.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_off0000bfdc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBFDC	10788 bytes
SHA-256: `602bb0197b9d54452d7cfa2cc59697a386683332d706d7183fc713b616f99a8d`
`font_01_sfnt_off0000d895.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD895	17452 bytes
SHA-256: `26bb8ea051d26b32a7fd0c252cf670a9fa7c595d5c894e1ed024cf0d8a814329`
`font_02_sfnt_off00010661.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10661	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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