PDF malware analysis — malicious · c2d0d6c5629620ef

MALICIOUS

PDF

85.2 KB Created: 2021-06-29 10:07:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: e72214cbec2e0710d98de575ceef4e32 SHA-1: 73ae386edde89af318bf8cbda1fd0f12cfce2d2b SHA-256: c2d0d6c5629620ef8a8f2bcce0a17dd06aeaafb6bc5686616039d4be7668d68c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to compromised websites, identified by heuristics such as 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM'. These links likely serve as a distribution mechanism for further malicious content, as indicated by the high ML score and ClamAV detection. No scripts were extracted, but the structure suggests a phishing or malware distribution lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9956

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 http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d9f4ee50973---3214663789.pdf In PDF document text
- https://mldom.xyz/web/img/podborky/files/zejiwidapitiwodemopejola.pdfIn PDF document text
- https://agrilaui.com/userfiles/file/lafejipebafamak.pdfIn PDF document text
- http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d3b6c4d0e---dixanatajawe.pdfIn PDF document text
- http://cdseoulps.com/uploadfile/fckeditor/file/gijiripijekegex.pdfIn PDF document text
- https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dd3a6f15e45d052b77bbba244a2f68b8/1831331402.pdfIn PDF document text
- http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1607912d41d20c---sopuvugili.pdfIn PDF document text
- http://lorofilmes.com/Uploads/ckfinder/userfiles/files/sisuvux.pdfIn PDF document text
- http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086bafd8bfbe---43015935564.pdfIn PDF document text
- http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f96e09457---lidopubirubafu.pdfIn PDF document text
- http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a72e8b870f---zemafemamipinibudip.pdfIn PDF document text
- https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/936a19a6055c51270b2adeb27dfc6a03/12898981770.pdfIn PDF document text
- https://hanurichurch.org/ckfinder/userfiles/files/42945181710.pdfIn PDF document text
- https://argumentua.com/i/file/16540332613.pdfIn PDF document text
- https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/qi1o6gm11l56r5i89s6g8abs2i/88818150722.pdfIn PDF document text
- http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16098d6f76bfef---bakibizatonejavupez.pdfIn PDF document text
- http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f78c685654---wipakip.pdfIn PDF document text
- https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/d224b803770471d80ad1d2a6e87aecbc/44197706455.pdfIn PDF document text
- https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/tl4k4k91t5annhorseajqukpgg/7736557240.pdfIn PDF document text
- https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/4974fe21e9d3df27d1212988bc24bcce/katevovazudajoguxomed.pdfIn PDF document text
- https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16096b86725fbd---wuveluzetopupuma.pdfIn PDF document text
- http://studiocalderini.it/userfiles/files/taduxija.pdfIn PDF document text
- https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/363be449b5d013c4f3981ddf3d0ad0e0/fexetuvavupukekele.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=methane+burns+in+oxygen+to+form+carbon+dioxide+and+waterPDF 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_off0000e445.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE445	17456 bytes
SHA-256: `b607101d48b2979dc38e72a9cf664a1190719e43e002607f14523213b1f7083b`
`font_01_sfnt_off0001126a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1126A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012a81.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12A81	11412 bytes
SHA-256: `23193fa46fe1352981d363e4172e1fc4543dc1724051734617cb148822e3fb38`

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