PDF malware analysis — malicious · b6a5dbf076421fb6

MALICIOUS

PDF

89.2 KB Created: 2021-08-03 05:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: cc93839116c3c5a51a548f4aab112ce7 SHA-1: 28ca0ffff881bf1477f139ff7337ca3f50d4204c SHA-256: b6a5dbf076421fb6ab813787031a91f51d3c4fbd05098078b330da4f03c34e95

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads. No scripts were extracted, but the PDF structure itself is designed to facilitate malicious link distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

Heuristics 6

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 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://queure.ru/uplcv?utm_term=tableau+de+conversion+g+tonne PDF link annotation
- https://briljant-maleri.se/UserFiles/files/gexinesugisejikufe.pdfIn PDF document text
- https://rtvpuls.com/ckfinder/userfiles/files/2424176597.pdfIn PDF document text
- https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/c8838d57401685fa9d93d9e5b65f7d2d/zagutunojepameture.pdfIn PDF document text
- https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/dvs0a6mtb2lsg7a5vrje5cjedl/44351888919.pdfIn PDF document text
- https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/cb230763a2d5346f408fffd8abc85489/vudomupagakejepud.pdfIn PDF document text
- https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/eccfb5efc60c32bcae8968fd2324a206/5950860339.pdfIn PDF document text
- https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/6fd19f32b7a5dded36b37f6d11b19750/bidawovulonidab.pdfIn PDF document text
- http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16099c1bf2edd5---menatujerozedikozarit.pdfIn PDF document text
- https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/vt4nr777dma7cc29r7gm67l466/fepisa.pdfIn PDF document text
- https://ooo-kenk.ru/userfiles/file/37326246740.pdfIn PDF document text
- http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f37929e76---fedalor.pdfIn PDF document text
- https://sieuviet.net/webroot/img/files/59033484278.pdfIn PDF document text
- http://www.tobywells.org/media/fckdir/file/gulegokasiwafomakasawomad.pdfIn PDF document text
- https://fetogram.com/images/upload/files/fifeki.pdfIn PDF document text
- http://canhtoanland.com/upload/files/5282773471.pdfIn PDF document text
- https://texigo.tw/upfile/files/2021/07/13/12087106124.pdfIn PDF document text
- https://monographie.com/ckfinder/userfiles/files/31344803448.pdfIn PDF document text
- http://metallpress.info/files/19772046948.pdfIn PDF document text
- http://fotomil.pl/ckfinder/userfiles/files/10704516282.pdfIn PDF document text
- http://tate79.com/clients/868750/File/94318608955.pdfIn PDF document text
- http://havefuntogether.com/image/upload/File/53801440918.pdfIn PDF document text
- http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bgc10dmmacd988jm34dpt8m2k0/59382425840.pdfIn PDF document text
- http://beytarimcilik.com/admin/editor_resim/file/benafedigukixixudag.pdfIn PDF document text
- https://loctra.net/userfiles/file/19032012076.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_off0000f0cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0CF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000108e6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x108E6	10816 bytes
SHA-256: `8dc5f95654027aca1fd1797a5191246f49fb18375149d2c1d9aec016bdb3b65a`
`font_02_sfnt_off000121c5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x121C5	20472 bytes
SHA-256: `c5c496c6224c172f85cc19b268ca2c8106323dd326e6090db050b393be93ea04`

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