PDF malware analysis — malicious · 06c3c708877c2886

MALICIOUS

PDF

89.1 KB Created: 2021-07-01 21:52:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 11eaaf40fcc8d07e4dd7de7d1acaa7cf SHA-1: 32f3109994ff74f615710ceeb6a12cf76ef3df1f SHA-256: 06c3c708877c2886d6ca3bbf204d28ab176e78cf0219efcc25da7a09c4ecaa6a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised CMS uploads and disposable hosting, indicative of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution through these external links.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

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://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/82102440242.pdf In PDF document text
- http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b189e7ad9f---mulobodizifade.pdfIn PDF document text
- https://betentour.com/sites/default/files/file/gagudejobezuwilafoj.pdfIn PDF document text
- http://aaaexpressac.com/userfiles/file/gudalipaximuxomovuv.pdfIn PDF document text
- https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609923a49e208---9168836006.pdfIn PDF document text
- http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/6e356a3d037bad73ed02cc0fdfcbe5ae/gefovopomipulinebupebum.pdfIn PDF document text
- https://burstallconrad.com/editor_files/file/volutoxezonaxisipowaxu.pdfIn PDF document text
- https://cdmsig1.com/ckfinder/userfiles/files/dunevexiniw.pdfIn PDF document text
- https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/8a26d991d0e026cd07ce287849b822c3/29172775547.pdfIn PDF document text
- https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/m3vcq3bqsq467uknns4e1tc7r9/bezuzilelidone.pdfIn PDF document text
- http://somsit.com/ckfinder/userfiles/files/xekakotazujuwebol.pdfIn PDF document text
- https://locktactyuma.com/ckfinder/userfiles/files/68936819842.pdfIn PDF document text
- http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609875b154bee---kasemodozefudanirepowo.pdfIn PDF document text
- https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/7mks1l1ql68i77o03lrbm5hqo6/61395812819.pdfIn PDF document text
- http://bilmatbasim.com/userfiles/file/ruwozokujutuvezubix.pdfIn PDF document text
- https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/6c73c6ecea729b763a427eb023851d47/86845610566.pdfIn PDF document text
- https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/b41ec877dc54e43f88e01f3b1ce1e552/67902878032.pdfIn PDF document text
- http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160afcfb165102---jafabononezugugikonazofol.pdfIn PDF document text
- http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b317b65994c---84848752078.pdfIn PDF document text
- https://nhahangbienhaitien.com/uploads/files/tozidadononigoni.pdfIn PDF document text
- http://anhopphat.com/uploads/files/giwezoduxababoputafopupi.pdfIn PDF document text
- https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bc98a64c6cd---80319789041.pdfIn PDF document text
- http://stananddiane.com/clients/6/67/672a2699e369d648dd23e03de9deda78/File/turakoxezarinabaleturonu.pdfIn PDF document text
- http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c743997b94a---47577015041.pdfIn PDF document text
- http://hoaisonland.vn/upload/files/sutetejibofexi.pdfIn PDF document text
- http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/3613e10276898bab00af8cb5c135c095/92337959910.pdfIn PDF document text
- http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607248c770a83---70889638131.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=how+can+i+combine+multiple+pdfs+into+onePDF 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_off0000f75b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF75B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010f72.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F72	10996 bytes
SHA-256: `33254a33ade5d5800d3c59dfa5b2e427edf1a5086c96382931caa606769676bb`
`font_02_sfnt_off000128c6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x128C6	17368 bytes
SHA-256: `4b30bf36a0bcc6b7106cce647bba73c7d9d43ed3df7f9fdc3d11934cc07c9275`

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