PDF malware analysis — malicious · 7ac400d3ba984602

MALICIOUS

PDF

93.5 KB Created: 2021-06-29 17:17:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 7e88b1ceee6899095696b2e8e687fff6 SHA-1: 0e9a4aa7470fe2d2b181820f59993c77210473a8 SHA-256: 7ac400d3ba984602bb0ec1239b0c893d03577645118b9b49cf2f7d4982078372

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of external URIs and a high ML score indicate a strong likelihood of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9820

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://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/gcpbhed0cdllgm9c4ocunl7o15/pebaw.pdf In PDF document text
- http://e-district.org/userfiles/file/42635119436.pdfIn PDF document text
- http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac21debde07---21650344752.pdfIn PDF document text
- http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16079b1ec956c3---63377678738.pdfIn PDF document text
- http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/1dbe28b1357baf8d8b915b52388211c2/55109756083.pdfIn PDF document text
- http://screen.by/images/file/1782970832.pdfIn PDF document text
- http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/a66f9bc367883d0da83f1983ffbec109/podenavajinemexedunuxuz.pdfIn PDF document text
- https://amursvoidom.ru/media/files/kiguxemovisafekuxekutev.pdfIn PDF document text
- https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e07168a4dd---riruparebago.pdfIn PDF document text
- https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073565ba443e---60314071980.pdfIn PDF document text
- https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/jg0jerce3ecthpam1li71sa07f/39522163956.pdfIn PDF document text
- https://anpheatingandac.com/nbloom/fckuploads/file/mokazilegixifezaxapawovox.pdfIn PDF document text
- https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b68d914ceb---devasudelas.pdfIn PDF document text
- https://internationalmedia.com/userfiles/file/16023775663.pdfIn PDF document text
- https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d6b934242---61617184598.pdfIn PDF document text
- https://hashtag.school/userfiles/file/tokesepufotigebuzimar.pdfIn PDF document text
- http://pivotal-technologies.com/userfiles/file/16901345144.pdfIn PDF document text
- http://marcelponjee.nl/ponjeefiles/file/soguke.pdfIn PDF document text
- https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/0ffa21a8c1b1add26969c0cfde261e5d/86126333389.pdfIn PDF document text
- http://boothbayharborshipyard.com/userfiles/file/dapovetijegawetilok.pdfIn PDF document text
- https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/4bb61e9710434afdd363a9f40733a4c8/juzanoz.pdfIn PDF document text
- http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/251307584356.pdfIn PDF document text
- https://easy2ticket.com/upload/files/73770738126.pdfIn PDF document text
- https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/rqoms1a7ket9jkd8faud89gd1e/vufex.pdfIn PDF document text
- https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/74231dfdabe17caf2a25e14119e17198/4847691975.pdfIn PDF document text
- http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a92d019fbf6---44871943328.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=betting+on+favourites+footballPDF 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_off0001089d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1089D	10748 bytes
SHA-256: `c986d5b18a01bb3577d5d5b05fc8b3171fead58095e03bd78aeffca0cbf945cf`
`font_01_sfnt_off0001218d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1218D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001399f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1399F	17824 bytes
SHA-256: `23bf01bd97490b707a07a7fc0e287ebab3c13f9b41682b1912bbc5642ed24b9d`

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