PDF malware analysis — malicious · d50fd036c516f9e6

MALICIOUS

PDF

70.2 KB Created: 2021-10-01 16:17:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: 0673157d13ff8a1686dfdc0bd655ab3e SHA-1: 76b14782f1d24cd93dde6a93ba2de8ecdb69583d SHA-256: d50fd036c516f9e64f7ce76637b48799e8fce263e26b4886c7425111b0b7a98d

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate high maliciousness. It contains embedded JavaScript and numerous external URIs pointing to potentially malicious sites, suggesting it's used to redirect users to phishing or malware download pages. The PDF structure and numerous links indicate a link farm designed to obscure the final destination.

Machine Learning

Nyx PDF Classifier malicious score 0.9978

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://nomylo.ru/uplcv?utm_term=big+data+science+in+finance+pdf PDF link annotation
- http://twozonechickenlasvegas.com/uploads/files/56928755241.pdfIn PDF document text
- http://mbeautyconcept.com/upload/content_images/file/lepamavidujomemiridurawaj.pdfIn PDF document text
- https://impulsa.mantareys.net/uploads/plantillas/files/74841338385.pdfIn PDF document text
- http://yaqeen-eg.com/userfiles/file/bifajalura.pdfIn PDF document text
- https://www.marjojaspers.nl/ckfinder/userfiles/files/96329357869.pdfIn PDF document text
- http://sumosushingrill.com/uploads/files/12022282509.pdfIn PDF document text
- http://yilbasipromosyonu.com/userfiles/file/66708176923.pdfIn PDF document text
- https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e3ec63fdb2---zudopezepijotuvegufame.pdfIn PDF document text
- http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140bd36df283---67691366874.pdfIn PDF document text
- http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/14243698945.pdfIn PDF document text
- http://klawiatury-foliowe.pl/_data/file/zugibirufoxujud.pdfIn PDF document text
- https://yenicekentkaplicasi.com/userfiles/file/45333074584.pdfIn PDF document text
- http://abnicum.com/files/file/fiten.pdfIn PDF document text
- http://strojsteel.cz/webpagebuilder/ckfinder/userfiles/files/rejimilamo.pdfIn PDF document text
- http://tomaszskiba.com/userfiles/file/32298033950.pdfIn PDF document text
- http://ztkammer.at/uploads/file/debumobomunipaxazule.pdfIn PDF document text
- http://www.vljainandco.com/userfiles/files/pifigerapabeviwaj.pdfIn PDF document text
- https://illinoisfiscalpolicycouncil.org/app/webroot/userfiles/file/kekidawekexukefezulesured.pdfIn PDF document text
- http://qianlong99.org/ckfinder/userfiles/files/gujizubikazos.pdfIn PDF document text
- https://fivetc.net/uploads/files/newuwikeleserezuzexux.pdfIn PDF document text
- http://playeasypiano.com/resources/fck_images/lisudiwixinemok.pdfIn PDF document text
- http://one9five.com/userfiles/files/vabejemonif.pdfIn PDF document text
- http://www.cst.rnu.tn/js/ckfinder/userfiles/files/birodajumim.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_off0000b254.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB254	10584 bytes
SHA-256: `2e7c5e131812bf57f25427e904dc82e1b5e4e1da7031102e849b6dcc4ed71dea`
`font_01_sfnt_off0000ca74.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCA74	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000e286.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE286	15812 bytes
SHA-256: `9153d6ccceb83c91efdaa4b072d93284e686b697e09871684b1492987756400a`

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