PDF malware analysis — malicious · d93d606165564a0c

MALICIOUS

PDF

71.4 KB Created: 2021-09-14 01:48:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 66b6bd24b87cc5c06fbc4a6df1d18e11 SHA-1: dc1a609d1fd9556f632006ffe20132f651ed4afd SHA-256: d93d606165564a0c17f861958b5e6343a88dd8e254e80a40b78ba96eee161f66

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF sample was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to various domains, many of which are associated with link farms and disposable hosting, suggesting a phishing or scam campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights the nature of these links.

Machine Learning

Nyx PDF Classifier malicious score 0.9956

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://sunpower.lv/ckfinder/userfiles/files/59118298519.pdf In PDF document text
- http://extintoresorigen.com/images/editor/ridivezonepova.pdfIn PDF document text
- https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16135c2f9c9a57---bozudaferujixa.pdfIn PDF document text
- http://marleenjansen.nl/images/uploadfiles/lalowexixoxasim.pdfIn PDF document text
- http://topup-fight.com/ckfinder/userfiles/files/jeloreketimore.pdfIn PDF document text
- http://andlupa.com/userfiles/file/xotijabapujezowawiwanib.pdfIn PDF document text
- http://flygarfield.net/userfiles/file/fapowopejiz.pdfIn PDF document text
- https://bomnuocebara.com/quangbasanpham/app/webroot/upload/image/files/34502404564.pdfIn PDF document text
- https://rotterdampools.com/contents/files/vubonureposasitisagarevo.pdfIn PDF document text
- https://varbackaforskola.se/ckfinder/userfiles/files/53735712247.pdfIn PDF document text
- http://sbkf.org/files/files/jebiwenupinuxuni.pdfIn PDF document text
- http://nickels.design/ckfinder/userfiles/files/67860415651.pdfIn PDF document text
- http://sendedianqi.com/upload_fck/file/2021-9-9/20210909033650155297.pdfIn PDF document text
- https://angkortaxiservice.com/userfiles/file/78768705933.pdfIn PDF document text
- http://pijntherapie.be/uploads/files/38284442667.pdfIn PDF document text
- http://harlit.com/upfiles/file/pogowixepedinefenozosafug.pdfIn PDF document text
- https://bibliotheque-des-arts.com/ckfinder/userfiles/files/50053186395.pdfIn PDF document text
- https://twinslock.com/ckfinder/userfiles/files/juzaw.pdfIn PDF document text
- https://sproname.com/files/userfiles/files/18047253901.pdfIn PDF document text
- http://noahmission.org/dataroom/file/fexidavifukow.pdfIn PDF document text
- http://pnmanagementsolutions.in/uploads/foverupizabuzo.pdfIn PDF document text
- http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613a5e7e768ba---voredetenazuzorogib.pdfIn PDF document text
- https://nilsahost.com/calisma2/files/uploads/10748778265.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=iphone+vs+android+gamingPDF 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_off0000b66f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB66F	16424 bytes
SHA-256: `0d598e2217b7c2a9f826fb54e368da2f7f00432c60979034b2138b497c965370`
`font_01_sfnt_off0000e03a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE03A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f851.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF851	10712 bytes
SHA-256: `d3d76239378402de3c290bb44993ea51c0905114bef7085afc6bcacee683855d`

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