PDF malware analysis — malicious · 522b36d5626e4ecd

MALICIOUS

PDF

79.2 KB Created: 2021-06-26 05:14:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 3a6a0b56d706e64777b295ec01fd3339 SHA-1: 04710b45fd2d1759e5452ac229d3a4a95dd7976d SHA-256: 522b36d5626e4ecdd40eb579e85ac72631525bcc32682fd1404c7b7d936cb0b5

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple compromised WordPress upload directories and other disposable hosting sites. The primary purpose appears to be redirecting users to malicious content, likely for phishing or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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://ehomeforeclosure.org/images/file/pisuwexabisalewex.pdf In PDF document text
- https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/7860d0e5bc87570be56f7bcaa2512de8/16494065960.pdfIn PDF document text
- https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/2976e6fcf7ba8d4a4389b80388e2e631/20843325828.pdfIn PDF document text
- https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c46c3388ce0---givepewo.pdfIn PDF document text
- http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f44f8e9d93---520381545.pdfIn PDF document text
- http://alternatifmedikal.com/img/userfiles/files/87635608499.pdfIn PDF document text
- http://myphamlulanjina.com/upload/files/nomipezujananewo.pdfIn PDF document text
- https://condicionamentofisico.com/arquivos/file/raxabalem.pdfIn PDF document text
- https://hotelindigha.com/FCKeditor/file/64914264468.pdfIn PDF document text
- http://allnatureint.com/userfiles/file/mojupoboguvudupama.pdfIn PDF document text
- http://circuitoinsulargc.com/documentos/file/4083598201.pdfIn PDF document text
- http://rgn2u.com/userfiles/files/56512489977.pdfIn PDF document text
- http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/46cd27ba4050f2f928305d726305ba3d/fezafog.pdfIn PDF document text
- http://avtrak.ru/ckfinder/userfiles/files/90284941016.pdfIn PDF document text
- https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/0b8827e4b9796079475377d0298dd070/56481883262.pdfIn PDF document text
- http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d11d50909---59906992256.pdfIn PDF document text
- https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/47g4tjc594im0p4mcvqnbbjpc3/82332872770.pdfIn PDF document text
- http://alexhofford.com/temp/files/file/97152560375.pdfIn PDF document text
- http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bb1921ee10---54175526516.pdfIn PDF document text
- https://pingthye.com/userfiles/files/vonibifagetesoxuparadij.pdfIn PDF document text
- https://marmarases.com/upload/ckfinder/files/12101322542.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160abdeab994c0---vopegumebe.pdfIn PDF document text
- http://herningbadintra.dk/app/webroot/upload/files/92346076814.pdfIn PDF document text
- http://campcolefamilyreunion.com/clients/82065/File/bipinunojef.pdfIn PDF document text
- http://gapoom.com/upload/fckeditor/file/kegopoduruwobodipebojanig.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=160+gbp+in+audPDF 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_off0000d52b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD52B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ed3d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED3D	16744 bytes
SHA-256: `e151383dd70e91c3efefc9082ae29ec1a97befd73c779c39e330037613d7d306`
`font_02_sfnt_off000118aa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x118AA	10388 bytes
SHA-256: `5ba315aba5bdfbaa9d07224b7c9d20f008e4d87a68937d84aace6e30205c9976`

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