PDF malware analysis — malicious · d957ce7cad12fbfb

MALICIOUS

PDF

74.8 KB Created: 2021-08-17 05:11:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 780bd4e8b57991a2c2dd328918e8e480 SHA-1: aed25e352abe8279e53d3a0c3af461b5fad911f6 SHA-256: d957ce7cad12fbfbecb14185d001bada3b5f1b13dc00681f2cca4dbff2da28f1

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and exhibits characteristics of a phishing lure. It contains a large number of embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest a malicious intent to redirect users to potentially harmful content. No scripts were extracted, but the presence of numerous links indicates a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier suspicious score 0.4545

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.
QR-code redirect lure medium SE_QR_LURE

Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
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://garglob.ru/uplcv?utm_term=yeh+desh+hai+veer+jawano+ka+remix+song+mp3+download PDF link annotation
- https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/52a85833bad61764b9e0a7c052ab2ad1/2592362766.pdfIn PDF document text
- http://mobilenmr.com/files/files/julat.pdfIn PDF document text
- https://gw21.ch/uploads/userfiles/file/jibamebanitojukex.pdfIn PDF document text
- http://acevina.com/webroot/img/files/83590316437.pdfIn PDF document text
- http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8e2e31fad---fukilifonixosu.pdfIn PDF document text
- http://rajskiewakacje.pl/userfiles/file/55188354305.pdfIn PDF document text
- https://atkarisuli.hu/userfiles/file/zokosenaxazimapu.pdfIn PDF document text
- http://dribblebar.pl/userfiles/file/10996838721.pdfIn PDF document text
- https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/girih62lbcubbrggu1fnct1dam/letexuvuveme.pdfIn PDF document text
- http://anhuifan.com/upload_fck/file/2021-6-5/20210605163856893875.pdfIn PDF document text
- http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/fupexiraxajixares.pdfIn PDF document text
- http://www.mamafoundation.cz/ckfinder/userfiles/files/mojeririlodogezodivikifak.pdfIn PDF document text
- https://burkina-businessschool.com/business_school/uploads/file/delupozi.pdfIn PDF document text
- http://chnli.tw/CKEdit/upload/files/41178853803.pdfIn PDF document text
- https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba51ec3c91---repepar.pdfIn PDF document text
- http://doubles301.jp/files/ckeditor/files/fuwuti.pdfIn PDF document text
- https://iguanapools.com.au/wp-content/plugins/super-forms/uploads/php/files/6ioj1c19u35bloac3fc8n3g6qj/ninonibobebol.pdfIn PDF document text
- https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/38b2c743885acc2b88f7a4b0f4e4c105/22694638792.pdfIn PDF document text
- http://kimwendelldesign.com/ckfinder/userfiles/files/vexuxisoselife.pdfIn PDF document text
- http://nato-denkmal.de/uploads/file/80998429408.pdfIn PDF document text
- https://echipamente-scule.ro/userfiles/file/55991637281.pdfIn PDF document text
- https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/aa3a790d1dfeeaadbf10dd8511afcb39/batebiwewimi.pdfIn PDF document text
- http://soft-pro.hr/upload/datoteke/82736870402.pdfIn PDF document text
- https://houstoncoinshow.org/FCKeditor/file/besaporenoda.pdfIn PDF document text
- https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a21c01a9c4---budupexuzasusajanuk.pdfIn 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_off0000c521.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC521	11372 bytes
SHA-256: `08a0b9d3fd8540b301e2d8895f33787b88691a5f98022a034d96238ccc9e2b20`
`font_01_sfnt_off0000df86.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF86	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f798.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF798	16936 bytes
SHA-256: `c1f2333fdf99b38d61490c34a4b6068b350f4bf3cdc2deeae5adf8f041e3c247`

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