PDF malware analysis — malicious · c22fa0362c63ca57

MALICIOUS

PDF

73.4 KB Created: 2021-06-30 21:02:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04

MD5: bfb1bc92ecd672774d7136fb59672946 SHA-1: 9480c8a9d1afb58c6cf32d2d4edccf73442dda7d SHA-256: c22fa0362c63ca57fe8d827de37881c729dda4dee067fd0703a8ccb739894807

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9893

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d468a8578---48921466653.pdf In PDF document text
- http://isagenixmakessense.com/ckfinder/userfiles/files/7127465388.pdfIn PDF document text
- http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/glkhopck2io19ebelj7utckkp0/tiworubudiruz.pdfIn PDF document text
- https://actorconseil.com/files/file/bomer.pdfIn PDF document text
- http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce7b0e2ea67---jetazoxunabulasut.pdfIn PDF document text
- http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606c65d1011e6---dutabapijozenor.pdfIn PDF document text
- https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/cb0721744aeb5c233a30b3a65eb3cce3/92731407773.pdfIn PDF document text
- http://hesexpo.com/img/editor/image/file/zojiniwaka.pdfIn PDF document text
- https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/08c7cd05f096811c7cf43541cad9b341/sodebatexibuxiroriwoxol.pdfIn PDF document text
- https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/2ad774fc36725a89ca4402b82d949748/34724641474.pdfIn PDF document text
- https://finances-canada.com/wp-content/plugins/super-forms/uploads/php/files/33719a164c4676218670aa6a532dab73/64116177507.pdfIn PDF document text
- http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16250636251318.pdfIn PDF document text
- http://zrdb-drogbud.pl/Upload/file/80632277143.pdfIn PDF document text
- https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/4519dae705c53c16743d9ce7f60f2195/mozutupafubukolotivalib.pdfIn PDF document text
- https://kede.org/userfiles/file/pimapaviso.pdfIn PDF document text
- http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/phg5rofcg2sj802pk7klh85rt5/98569244930.pdfIn PDF document text
- https://oncallanatomist.org/ckfinder/userfiles/files/38518629960.pdfIn PDF document text
- http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160af12bab840e---fuwesogid.pdfIn PDF document text
- https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/h4bfjhbud84ggq0prpbeaje6e4/zapiwibajomajim.pdfIn PDF document text
- http://lukoilmarine.com/ckfinder/userfiles/files/3129400525.pdfIn PDF document text
- https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/715d5ec3ae54a8a75a8eede089343073/83802715771.pdfIn PDF document text
- http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c94abe17442---18150469753.pdfIn PDF document text
- http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160981203a591a---53583068234.pdfIn PDF document text
- http://bamila.vn/luutru/files/busakukuzu.pdfIn PDF document text
- https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/eqhnhs37brtig3neqrvf950h70/87380236701.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=the+purpose+and+power+of+praise+and+worship+pdfPDF link annotation
- http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/b989897cbcc35d70e4c00cbb322ebe72/8297136075.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000beab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBEAB	16104 bytes
SHA-256: `da383f1f55d265a7786ecfabdfe46eae518376915af52d620c4413eae644d284`
`font_01_sfnt_off0000e7b2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE7B2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000ffc9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFFC9	10600 bytes
SHA-256: `18cdc5b6f504fbd2d2d3db69bb023292185b968ea9192ebd5b5e0bc3d047dcf5`

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