PDF malware analysis — malicious · 5057395a782b32aa

MALICIOUS

PDF

83.7 KB Created: 2021-09-01 08:59:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 0e62f6399483d7d71b829f0b56ceeed4 SHA-1: 8243021932d2300a34545243d3e43efddafc4aeb SHA-256: 5057395a782b32aabf2ed758986750982a052870c798352311a3094aaf829abe

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The presence of numerous links pointing to various domains, including compromised CMS uploads and disposable hosting, indicates a link farm designed to redirect users. The primary purpose appears to be distributing malicious content or facilitating phishing attacks through these redirects.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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 http://www.bash.cl/media/file/labusaxu.pdf In PDF document text
- https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ab4310a92---64111998324.pdfIn PDF document text
- https://planet-for-events.de/userfiles/file/88078252078.pdfIn PDF document text
- https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/1l9dmg3ak1cv3im65b66bjlo4n/jujeka.pdfIn PDF document text
- http://champagne-marc-chauvet.com/images/files/pageniwif.pdfIn PDF document text
- http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/b61e38247mgcc21th38avf8do2/9024679014.pdfIn PDF document text
- https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160fe6581be0fd---54142378459.pdfIn PDF document text
- https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db65379c737---jupip.pdfIn PDF document text
- http://sklepjola.pl/userfiles/file/48448785337.pdfIn PDF document text
- http://remproekt-m.ru/admin/ckfinder/userfiles/files/nomilizufijifiwexineguwog.pdfIn PDF document text
- http://autovoda.ru/upload/files/munupob.pdfIn PDF document text
- https://europartner2.pl/uploads/40869418735.pdfIn PDF document text
- http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1606f65af7eaa8---dudovekil.pdfIn PDF document text
- http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/e356c61b292ca0e64bd4fb32fbfffa7a/85426355633.pdfIn PDF document text
- http://zdrowejaja.com/Upload/file/bogigenevadabirodox.pdfIn PDF document text
- http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/61912627105.pdfIn PDF document text
- http://agataklimowska.pl/userfiles/file/86066454527.pdfIn PDF document text
- https://betenenergy.com/sites/default/files/file/49262299726.pdfIn PDF document text
- http://hutbephottaihaiphong24h.com/upload/files/99672670187.pdfIn PDF document text
- http://kaies.net/upfiles/210716152845714123flnug0.pdfIn PDF document text
- http://euredit-editions.com/userfiles/file/fizifoxikidixelotiroget.pdfIn PDF document text
- https://mmszke.hu/files/file/dewikejifobezunesebos.pdfIn PDF document text
- http://files.ibiza-ferien.de/file/5035654379.pdfIn PDF document text
- http://sahrugs.com/userfiles/file/timufir.pdfIn PDF document text
- http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/34624621332.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=english+bull+terrier+brown+and+whitePDF 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_off0000dfd3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDFD3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f7e5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF7E5	18404 bytes
SHA-256: `f94f737d713ee3f3ced054b32a3e262d5487cfecee0af407ae3a3645a36f9133`
`font_02_sfnt_off000127d2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x127D2	10836 bytes
SHA-256: `4b7c0bb7ee96da3bc0999046bf7de791036610b28cda4e4b1fc385cb0d4533b3`

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