PDF malware analysis — malicious · 64fd43c24bcff96f

MALICIOUS

PDF

86.4 KB Created: 2021-08-03 03:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 7ad15a722ef4a7f4852e964d261ad14c SHA-1: 5fad26aa51ca02e863611721652e74889771a1a2 SHA-256: 64fd43c24bcff96f58d57fba380ea40569730a195f685ad64ea9a59575b27347

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to obscure the final destination and evade detection. The document body is unreadable, but the heuristics indicate a link farm designed to lure users to external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

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.prieur-equipement.com/ckfinder/userfiles/files/lobasitemavo.pdf In PDF document text
- https://medtek.vn/storage/file/bewemasiv.pdfIn PDF document text
- http://movitecnic.com/ressource/site-image/files/69251552304.pdfIn PDF document text
- https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/a4s3t8ihj464i196dc1v659c8t/24175717310.pdfIn PDF document text
- https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c3c2770efb7---54085072249.pdfIn PDF document text
- https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/hapr8vkajfnmnd1m6529ooe485/32145895005.pdfIn PDF document text
- http://ever-pioneer.com/upload/files/kukofunoraladu.pdfIn PDF document text
- http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160784a23526f1---sulokut.pdfIn PDF document text
- https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f58fbf098b---98600601974.pdfIn PDF document text
- http://aceonlinementors.com/userfiles/file/kojawazobezovazejunu.pdfIn PDF document text
- https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce66751662---rijolusev.pdfIn PDF document text
- http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160719d411fd47---xudavanasip.pdfIn PDF document text
- https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/jgd44b0l2aie2mqhr4bp63q3aa/jitas.pdfIn PDF document text
- https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/03a48f789b7614e62c2edac508a345ca/85411827629.pdfIn PDF document text
- http://amandatravel.com/userfiles/file/96637948514.pdfIn PDF document text
- https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/pu15ggqn705t12lit0o2rjorl2/xofurokuf.pdfIn PDF document text
- http://birons.net/wp-content/plugins/super-forms/uploads/php/files/511760c15b578394cf6aeb59f5c70c26/11649691167.pdfIn PDF document text
- http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073d3f0c34aa---35415358891.pdfIn PDF document text
- http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609681ed96ca1---tinuj.pdfIn PDF document text
- http://op-gold.com/ck_image//files/96907060619.pdfIn PDF document text
- https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/b4368bbc82f466ebdc2eebc8606c2e83/57570191123.pdfIn PDF document text
- https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/5d359313e65084517cdf63462ad9fa68/41963432697.pdfIn PDF document text
- http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/5adfe421fc0a83931e1bf5ff927caf91/mutozokenadasazimototufu.pdfIn PDF document text
- https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/49090f7f03d48a205bbfdc0dbbbe99c3/47999248759.pdfIn PDF document text
- https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607369f3d63fe---vojibewujojibozi.pdfIn PDF document text
- https://investmentskillsgroup.com/images/userfiles/file/bevipamilob.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+assemble+shark+navigator+lift+awayPDF 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_off0000ebfb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBFB	11148 bytes
SHA-256: `85333673d319fc4538424ab5350a8c1b53adcd70306cb4f0380bc5144b5a38bc`
`font_01_sfnt_off000105e2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x105E2	17544 bytes
SHA-256: `46ab91f85fb6621a33d395afb1116931be4912aad5025e98a93df57ea2f39af9`
`font_02_sfnt_off0001337f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1337F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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