PDF malware analysis — malicious · 22d3cdff5ba6736d

MALICIOUS

PDF

91.6 KB Created: 2021-07-14 05:15:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: ace36cd291b0ef759e34d39469231347 SHA-1: f240821dac30d0d51fad62b63bb4d8cdc270c184 SHA-256: 22d3cdff5ba6736d68afcc7bb525195c41ed461a69cb09140341169681c7ef13

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is a PDF containing a link farm, as indicated by multiple heuristics and embedded URLs. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of numerous links to potentially compromised WordPress sites and disposable hosting points towards a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9786

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://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/oc9imsj643lchfec7ghkmtk9nt/71181136158.pdf In PDF document text
- https://dienlanhbachkhoa.info/upload/files/dixamodurite.pdfIn PDF document text
- https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/vcshk3m6lgkdkt6p5el0j0v07c/gopesuwimuza.pdfIn PDF document text
- http://bet-balance.com/userfiles/file/puvefik.pdfIn PDF document text
- http://accronline.com/userfiles/file/gemudomivefofufaxifulaz.pdfIn PDF document text
- https://bancodevida.com/bancodevida/admin/images/image/file/lalimuzitijo.pdfIn PDF document text
- https://southafricapools.com/contents//files/89428844740.pdfIn PDF document text
- http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7ca338f5d---xatuwoviz.pdfIn PDF document text
- https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608e479b352c9---misadoxatewan.pdfIn PDF document text
- http://spreewaldatelier.de/img/editor/file/28591622738.pdfIn PDF document text
- https://tedvandergulik.nl/userimages/file/bazolofu.pdfIn PDF document text
- https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/164d85986cf47cee46a1ad0185efa6a8/gujovovizexugepitotane.pdfIn PDF document text
- https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/b1f6efbe59ebab47bd047031d8a7b311/ditemenenela.pdfIn PDF document text
- https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/b2n859kpta9tsmtjsbb5m8ohhr/bexib.pdfIn PDF document text
- https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607b638145d9d---24215407919.pdfIn PDF document text
- https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/286612215d315d2f606c6cb5bc773b30/27880197055.pdfIn PDF document text
- https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/3b7930f48eeadab57dbb790ff9200f21/3613290280.pdfIn PDF document text
- https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbc28e61b0---fazokuwad.pdfIn PDF document text
- https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160805898bfb47---sizerawinetufipalosemuvin.pdfIn PDF document text
- http://driver-jazda.pl/upload/file/xebibotif.pdfIn PDF document text
- https://comtraining.cl/userfiles/files/56016694724.pdfIn PDF document text
- https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/b7fadf3889c46e9b82a1aa2bdb41cd9f/nopumokojitexunet.pdfIn PDF document text
- http://mywayrtk.info/userfiles/file/83925611464.pdfIn PDF document text
- http://alexanderkanevskyartistbiography.com/clientMedia/file/5214506377.pdfIn PDF document text
- https://houstoncoinshow.org/FCKeditor/file/besaporenoda.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=rtmp+in+browserPDF link annotation
- http://pro.ovh.net/~tribuene/images/banque/file/4286509979.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ed73.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED73	16140 bytes
SHA-256: `00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b`
`font_01_sfnt_off000102f0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x102F0	10476 bytes
SHA-256: `29e162a3898c94baef394bfe5e592b9a93f081d5fb4bd0feebea3e6283bc91b4`
`font_02_sfnt_off00011a8c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A8C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off0001329e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1329E	17800 bytes
SHA-256: `42dee20c685d66dec075cffd8f4fbf70d9d5e07663890e7ad4b747c6b8712206`

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