PDF malware analysis — malicious · d768ed96f696141a

MALICIOUS

PDF

86.5 KB Created: 2021-07-07 01:14:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15

MD5: 0cd928ae54bbcfb4d4ed272c92b522b7 SHA-1: 1fa73e165318062e3887795254c0742a5fd3b279 SHA-256: d768ed96f696141ab415cabfdcc43dc60ebe307431da3f1cfb3b79d6e9ed4a7b

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 a phishing trojan. The document contains numerous links to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content or conduct phishing attacks. Although no scripts were explicitly extracted, the nature of the links and the PDF structure indicate a malicious intent to redirect users to potentially harmful external resources.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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 https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/2a94470cc0a41a1227bb1644d14251d4/30411875135.pdf In PDF document text
- http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c56b80a5b01---gonupejirulase.pdfIn PDF document text
- https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/3370eabdaf6f1bc1997a28e873721fa4/46466106900.pdfIn PDF document text
- https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/e2703f1471762e60f1d5e422ec8161ac/59071712899.pdfIn PDF document text
- https://rowanmkt.com/Uploads/ckfinder/userfiles/files/3331328958.pdfIn PDF document text
- https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/u37bceqv6u2hdphk8e5guo13e6/kezewotenofaxud.pdfIn PDF document text
- https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/f6a434456139e324709c28370416e122/89421768610.pdfIn PDF document text
- http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/93edcd11f73c1d9627f726dd7d3b8c69/14475499434.pdfIn PDF document text
- http://jinistudy.com/_UploadFile/Images/file/81454478612.pdfIn PDF document text
- http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4ce03ca6dc---wovakipusovufizigamuret.pdfIn PDF document text
- http://thetuckerfamilyreunion.com/clients/67950/File/pudujilupufo.pdfIn PDF document text
- http://studiospazioambiente.it/userfiles/files/kuresuzemuluse.pdfIn PDF document text
- https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847b55958e4---tavas.pdfIn PDF document text
- http://beastyenergy.com/userfiles/file/pagabenokowasuv.pdfIn PDF document text
- http://nuestratierrapremios.com/campannas/file/84407867200.pdfIn PDF document text
- http://beerskiboot.de/img/upload/file/ridusedinaxaruletesud.pdfIn PDF document text
- http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa8b98c93f---wopanelulimuvag.pdfIn PDF document text
- http://metrocars.london/survey/userfiles/files/71660052500.pdfIn PDF document text
- https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/b2budi46k9ppnu3o23gdl8jl0a/zirapokus.pdfIn PDF document text
- http://hoshitorionline.com/uploads/files/nevad.pdfIn PDF document text
- https://ruiguoex.com/upfile/files/2021/06/21/mewumas.pdfIn PDF document text
- https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/34e4f8e93ba5f2cbf68ce1f15356d2fc/volizamibapukolugom.pdfIn PDF document text
- http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160920aa36343c---pifolep.pdfIn PDF document text
- http://truhlarstvisollner.cz/data/file/73186438639.pdfIn PDF document text
- https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/415ddbb190519c92e9698222a046c5f3/74134800387.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=phase+to+phase+short+circuitPDF 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_off0000ec70.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC70	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010482.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10482	18236 bytes
SHA-256: `6977373adcc9301921702eb1fa96efab53ab6af0fb0f3b3d1775a79c5d773d56`
`font_02_sfnt_off000134e0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x134E0	10424 bytes
SHA-256: `c68b4f31c5717dde326b6587dd6ec961d7abafb2113349a54a71d87133bc9071`

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