PDF malware analysis — malicious · d141af0958224383

MALICIOUS

PDF

87.5 KB Created: 2021-08-04 16:57:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: c34874300588c8530fde807702806ac5 SHA-1: 0459100d083f49c569283279ee0792db52d48252 SHA-256: d141af0958224383ecb9049c035cd4051074b1a45419179d5d82ecc396c491b4

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs hosted on compromised WordPress sites, indicating an attempt to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing and malware distribution campaigns.

Machine Learning

Nyx PDF Classifier malicious score 0.9914

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 https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c6074c36f74---90246009452.pdf In PDF document text
- https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/22d7882492f14f3892cad6134a1e7539/28764396832.pdfIn PDF document text
- http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160989e015e70c---71102935679.pdfIn PDF document text
- https://stancijanegrin.com/UserFiles/files/fibeferodobij.pdfIn PDF document text
- http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/68640208940.pdfIn PDF document text
- https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/f44070e3a375bd6697abcb919062abee/70940905501.pdfIn PDF document text
- https://confetti-seasons.ru/upload/files/gemoro.pdfIn PDF document text
- http://master-sign.ru/ckfinder/userfiles/files/83317019147.pdfIn PDF document text
- http://kubabus.cz/novy-web/upload/file/7927948521.pdfIn PDF document text
- http://taiwanglassgroup.cn/userfiles/file/tawititol.pdfIn PDF document text
- http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed0f23fb6c---17966499991.pdfIn PDF document text
- http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4126a3936f---podidobasilesewa.pdfIn PDF document text
- https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/naqph5jl4ljc768p29hhbdev5j/wejinakilifi.pdfIn PDF document text
- http://anhuizhkj.com/upload_fck/file/2021-6-5/20210605100345357929.pdfIn PDF document text
- https://aquarell.ro/userfiles/file/wituguxogolene.pdfIn PDF document text
- http://barcelonasixtytwo.com/userfiles/file/lozituwefiwomitarejiw.pdfIn PDF document text
- http://pinzimoniofiumicino.eu/userfiles/files/11819524949.pdfIn PDF document text
- https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/9385f47c6770cef88d1512e8c97b0d27/kevirefepavabelu.pdfIn PDF document text
- https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/c67ffb086dd06757ae37fd60eb9dd0a7/87828154842.pdfIn PDF document text
- http://at2apigroup3.com/contents//files/39087100548.pdfIn PDF document text
- https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/i0kete328cqpnair9i02cud7p4/4681878932.pdfIn PDF document text
- https://mtestbd.com/assets/uploads/files/mudegepibuzipugazojop.pdfIn PDF document text
- http://webbuilders.com/files/file/kusixojajobizuwex.pdfIn PDF document text
- http://dorp.pl/userfiles/files/78185431757.pdfIn PDF document text
- http://hollandunitedreunion.com/clients/5/52/52f3fdf721cdccceb566e47094f1d9de/File/57047875492.pdfIn PDF document text
- http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160bb5e3907d56---dizijo.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=hopeless+land+game+hack+mod+apk+downloadPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e72e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE72E	10840 bytes
SHA-256: `9cf9650856ed7a98eaa2489940997e82fe5dc05ad5744317fd264a42e1e052ea`
`font_01_sfnt_off0000ffc9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFFC9	1700 bytes
SHA-256: `15171638d69c9281a983de8a04f8d213e5ed86d33053034f6aa0dd130c4010d8`
`font_02_sfnt_off000107e0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107E0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off00011ff2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11FF2	18560 bytes
SHA-256: `b91bc38234f7de91592054ea477791c2658886f842c301b836ea18241d939ec6`

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