PDF malware analysis — malicious · baf59362769e3c66

MALICIOUS

PDF

86.2 KB Created: 2021-08-20 22:30:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: cd120ebf816b3c3a7bc00b5389cda74d SHA-1: e62ca97b5667a1b52c48987bde94e7c2ded2746e SHA-256: baf59362769e3c663ca6df1ae4ea251d706d993b11c5e62980424adff8a5b650

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised CMS upload directories or disposable hosting. This suggests the document is designed as a link farm to distribute malicious content or phish users. The embedded JavaScript likely facilitates the redirection or exploitation process.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

Heuristics 7

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://ventiliatoriai.lt/js/ckfinder/userfiles/files/boxumipamopeno.pdf In PDF document text
- http://alwaysfavorentertainment.com/clients/879371/File/40415047840.pdfIn PDF document text
- http://westmoorclassof1965.com/clients/5/52/52ec68f2b927accf75267cb07bfcc891/File/18182282776.pdfIn PDF document text
- https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/vshgm8n60it8uh2j037ocvc76r/34594826661.pdfIn PDF document text
- https://leavereview.com/customerinterview/ckfinder/userfiles/files/12082603532.pdfIn PDF document text
- http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160879cd734933---zupibarekomefuvu.pdfIn PDF document text
- http://ajarnveerapong.com/UserFiles/file/73709708665.pdfIn PDF document text
- http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609468cb8bc6d---34945933520.pdfIn PDF document text
- http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c19388ff1---8537701907.pdfIn PDF document text
- https://galerieportelouise.be/userfiles/files/84738742453.pdfIn PDF document text
- https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/58a806c0b8c10bd2d25bda3ab3936a1e/notalojepuzanejadipizeso.pdfIn PDF document text
- https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/712a42b39bddc9768e6eac7a9ec9909a/xabevomobevefajaxumojir.pdfIn PDF document text
- http://ahcxdq.com/uploads/file/14090429497.pdfIn PDF document text
- http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160983b26b517a---xewopekibazepimivizotopuf.pdfIn PDF document text
- https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/bcbc5d270fb357d73984037cd9a3d58a/jojagi.pdfIn PDF document text
- http://w-mill.jp/images/file/fokotamonulizixerazugoxu.pdfIn PDF document text
- https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/855544cc4439d2714554e28e16d842e6/9061409699.pdfIn PDF document text
- https://zapcdn.space/web/img/podborky/files/nujenusowofemedojod.pdfIn PDF document text
- http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160abf1b7c44f2---tilusitopujuliju.pdfIn PDF document text
- https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/3tvhrgeo44tqb8u3vkgt2b0pdr/zegaxugirod.pdfIn PDF document text
- http://benetalent.com/upload/files/bugabuvev.pdfIn PDF document text
- https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e7ce7f60e---notazug.pdfIn PDF document text
- http://gzky.cn/dubeite/ckfinder/userfiles/files/20210730_104203.pdfIn PDF document text
- http://camionespanamericana.com/userfiles/file/60215823629.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=clicker+heroes+cheats+pcPDF 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_off0000df12.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF12	10488 bytes
SHA-256: `d4934917f854b6b5e6dec92cb34b7fea27c57874ffb4bfdd1ef1b9f2d23235a8`
`font_01_sfnt_off0000f71e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF71E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010f30.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F30	22744 bytes
SHA-256: `89010c4a89966a834df013fdd4a8650cc72b185db482e0b744234a9b12b22941`

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