PDF malware analysis — malicious · d2b5b97dc6f7f67c

MALICIOUS

PDF

88.1 KB Created: 2021-06-26 06:29:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: e4a9a42e27e831d7a248023cf9de2bde SHA-1: 6dc8e1c914fa386a953a5a1842a0b17fe572f8c2 SHA-256: d2b5b97dc6f7f67c6da4180d2e5128042b5503e7d0af6ded715f82d6d7ad0e92

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous heuristics fired, pointing to the PDF containing a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution lure. The embedded URLs are likely used to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK

PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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://drafthe.ru/uplcv?utm_term=the+conversion+code+chris+smith+pdf PDF link annotation
- http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160785a4a4d839---makekopijugexi.pdfIn PDF document text
- https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9253415ec9---17874090502.pdfIn PDF document text
- http://alliance-vietnam.com/upload/files/53357718003.pdfIn PDF document text
- https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/bsp9huqpafevtnfougmrmk1ktu/21039095353.pdfIn PDF document text
- https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/1d55ab134c1886333b3486d0d493666a/katoxavurukumobododux.pdfIn PDF document text
- https://binarbaidequipment.com/public_html/userfiles/file/73514726583.pdfIn PDF document text
- https://debcopharma.com/userfiles/file/letawaveni.pdfIn PDF document text
- http://atomleasing.ru/media/File/45348072274.pdfIn PDF document text
- https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/a86d24f743165394c8c98a5bd82d9e4e/24926600101.pdfIn PDF document text
- http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1f3d922c5---zoxosupidexexuwavagugedi.pdfIn PDF document text
- http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608756976a904---36544573132.pdfIn PDF document text
- https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/9b278c1ee7676cc7ed42465699fef53e/15595147660.pdfIn PDF document text
- https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/762412f6d27a40b1befab1c0f1e48a3a/55413417703.pdfIn PDF document text
- http://drironcat.com/images/file/rodapidodimulofepokofuta.pdfIn PDF document text
- https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/6f833861f7e5c3362ab5cfc98e20c96c/xazulosuludujije.pdfIn PDF document text
- http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609cec90ebc65---17640663808.pdfIn PDF document text
- http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/likuwuvap.pdfIn PDF document text
- https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/1b21a01d284eceef1df3e02477d90443/raged.pdfIn PDF document text
- https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/4636bbed0f003ce938df782fc4e6bab6/4703397676.pdfIn PDF document text
- https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/04c4ce246e4b007c05e8643e1975dffa/rujukemovuriviro.pdfIn PDF document text
- http://sobinco.cz/ckfinder/userfiles/files/49613462752.pdfIn PDF document text
- http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160beef2e5437d---18237413047.pdfIn PDF document text
- https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/728de1ed54bab02128cc6d88c3da7a4d/21929628887.pdfIn PDF document text
- http://itineraire-consulting.com/ckfinder/userfiles/files/rovap.pdfIn PDF document text
- https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/t2icao7bosdoac9pik8f6p9f24/deronidixowarusig.pdfIn PDF document text
- http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/i6c13qq4eucklip8ha06i56to7/98308173233.pdfIn PDF document text
- https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160884e619631b---62566628633.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_off0000f32c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF32C	18052 bytes
SHA-256: `46907cf065d274cc76062a8883107ee359ea5261d4250a7c8623b897113f2383`
`font_01_sfnt_off0001227b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1227B	10704 bytes
SHA-256: `63ad577e8adf6b4b4c80b4ef7f3626bc065896dbd4816b4d1931eb6e94644eaa`
`font_02_sfnt_off00013ae5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13AE5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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