PDF malware analysis — malicious · cc2b98bc525f79cb

MALICIOUS

PDF

72.0 KB Created: 2021-10-01 03:16:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: f2444d607290413810f8cda7fcc02eb6 SHA-1: 6a143d2f455d6431f5133205dd5ceade5c28875f SHA-256: cc2b98bc525f79cb963e8202c188fae65f7e09b52206050476a6390b32e1e726

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. Heuristics indicate it functions as a link farm, pointing to multiple compromised WordPress sites and disposable hosting domains. The embedded URLs are designed to trick users into downloading further malicious content, likely through a phishing pretext.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

Heuristics 6

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.
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://fatfailogistics.com/fckeditor/files/file/68150274066.pdf In PDF document text
- http://worldcar.jp/userfiles/files/vumarigaz.pdfIn PDF document text
- http://gardatrans.com/content/Files/81838792042.pdfIn PDF document text
- http://whipitleather.com/userfiles/file/34314372498.pdfIn PDF document text
- https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/b5e7febe062c83596c8f852427759b3b/madibojapamiwafodagogasaz.pdfIn PDF document text
- https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/42d19e7973d983940dbe470f7b4a15d8/weruwojoxar.pdfIn PDF document text
- http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b29340d928---lotaj.pdfIn PDF document text
- http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146bbfe61883---lokuvojukuziduxaxitomo.pdfIn PDF document text
- http://carbontuning.ru/file/zezunerejidunut.pdfIn PDF document text
- https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/8b3916e3c1c2d65a65b7f354d0b93058/sofozawopagoxolasenidijub.pdfIn PDF document text
- https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/08b6399ee7ee084bc4b7542f07f48289/tizaxefarisi.pdfIn PDF document text
- http://hurtmar.pl/Upload/file/jefedima.pdfIn PDF document text
- http://fabtur.ru/upload/files/zaxefekuxuridido.pdfIn PDF document text
- https://snieznik.pl/userfiles/file/41310153736.pdfIn PDF document text
- https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/d50c3be59d8e7f5d399032495ffb0ac0/64908994866.pdfIn PDF document text
- https://nomortiga.com/contents/files/10696915995.pdfIn PDF document text
- http://konberdbio.com/upload/files/99942044110.pdfIn PDF document text
- https://123natura.com/stockages/files/wijekisu.pdfIn PDF document text
- https://www.playitdirect.ca/ckfinder/uploadfiles/files/bujodoverajosa.pdfIn PDF document text
- http://www.julietlandau.com/fckeditor/userfiles/file/64367219980.pdfIn PDF document text
- http://terredellamagnagrecia.com/userfiles/files/jufawogapukowifigop.pdfIn PDF document text
- http://autosoftware.company/autoresponders_images/files/38608079159.pdfIn PDF document text
- https://alshuka.ps/ckfinder/userfiles/files/xowiri.pdfIn PDF document text
- https://esperanzadeavila.com/fotos/file/serejavuvobagekowa.pdfIn PDF document text
- https://cabinetscounters.com/ckfinder/userfiles/files/86120538127.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=android+default+playerPDF 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_off0000b51c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB51C	17580 bytes
SHA-256: `85d97847b51952f339d0db175ba4f00caab8f901ddd76c5051daeb0501c5aa0b`
`font_01_sfnt_off0000e290.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE290	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000faa7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFAA7	10520 bytes
SHA-256: `0354dd6ab53f66ec1c33cd081f1ad8c0a66337fc623091001b172f58cc4e0203`

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