PDF malware analysis — malicious · f97e8d24c5e0b720

MALICIOUS

PDF

81.5 KB Created: 2021-09-21 03:03:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 1da53ff7660d1d7c94ef0747553d9ab1 SHA-1: 9c76301278fe90691f47224c3155d125f85963b6 SHA-256: f97e8d24c5e0b72067a772aeb76ccd21458a3ed8ff6a2752bf57cd429b94d56b

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's used to redirect users to potentially malicious sites. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9944

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 https://coretry.ru/uplcv?utm_term=gta+vice+cheats+apk PDF link annotation
- http://shtaket46.ru/page_edit/_samples/userfiles/files/lavigabalaviforotu.pdfIn PDF document text
- http://dezmaster.com/userfiles/file/94014568682.pdfIn PDF document text
- http://md-servicios.com/userfiles/file/8666607115.pdfIn PDF document text
- https://bancodevida.com/bancodevida/admin/images/image/file/35858001406.pdfIn PDF document text
- https://edinburghpools.com/contents/files/42331133749.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b05303e15a---filinopifezevu.pdfIn PDF document text
- http://z500.si/files/vowejule.pdfIn PDF document text
- https://cplastik.net/data/cms/file/nelodifawisepelinujik.pdfIn PDF document text
- http://umbabox.com/userfiles/file/13925308004.pdfIn PDF document text
- http://www.anclupnapoli.it/userfiles/file/89153828831.pdfIn PDF document text
- http://studioriboldi.eu/userfiles/files/52654819058.pdfIn PDF document text
- http://104408017.linker.tw/files/37456055569.pdfIn PDF document text
- https://cezartravel.hu/userfiles/file/17294855594.pdfIn PDF document text
- http://proclima-membranes.ru/userfiles/file/26685475932.pdfIn PDF document text
- https://www.pharmawell.eu/ckfinder/userfiles/files/seteb.pdfIn PDF document text
- https://taperagi.com/contents/files/remuxifokek.pdfIn PDF document text
- http://tvkinter.com/file_media/file_image/file/96481295368.pdfIn PDF document text
- http://80tner.netsociality.com/upload/files/dobemoxukirikopuwa.pdfIn PDF document text
- https://stijsr.com/userfiles/file/wejobebiwexekugijo.pdfIn PDF document text
- http://jan-fotografie.nl/upload/files/35272847795.pdfIn PDF document text
- http://andlupa.com/userfiles/file/16056287475.pdfIn PDF document text
- http://ottomaniantextile.com/userfiles/file/dikewedodaw.pdfIn PDF document text
- http://computergramm.com/userfiles/file/nejogowomizuposaxe.pdfIn PDF document text
- https://braus.uz/images/shared/file/zisuveda.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c19b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC19B	17692 bytes
SHA-256: `33ad4a4a7b23f617b7396dc9f79b997a3072c1aa665d7d0dc1c23c1f5ec25f8b`
`font_01_sfnt_off0000dc40.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDC40	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f457.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF457	10296 bytes
SHA-256: `14bb86bbd99942d2ba255b7838af25160a1b43ffef47a28cc745f0fdbea6f69a`
`font_03_sfnt_off00010bc6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10BC6	16940 bytes
SHA-256: `2dbd9e41fdd28e29c2355b3e1fb70a485ebde3876030b01fba46339cafa4231e`

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