PDF malware analysis — malicious · 8e97c4d54c016a73

MALICIOUS

PDF

88.2 KB Created: 2021-07-31 21:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29

MD5: b35a82ddd06c3b26153a2ab108d9ff06 SHA-1: d327e20bdbb137365750e9205d7670ad417b1181 SHA-256: 8e97c4d54c016a73b70b59d5f10d8d2d07d1ca1670e369525e6b39f5c1b6bb90

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URLs point to a common tactic of using documents to host redirectors.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

Heuristics 6

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.
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://allytemp.ru/uplcv?utm_term=position+time+graph+worksheet+answer+key PDF link annotation
- https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/c8f8ae88c5d15d917c651b22dbab01d2/22959257312.pdfIn PDF document text
- http://praguetransfer.com/files/file/24844838723.pdfIn PDF document text
- http://vpecargo.com/userfiles/file/93715766470.pdfIn PDF document text
- http://womenshealthcarenp.com/clients/2/29/29a32d4da59f0b4eaa4573e1354aeabc/File/sadaxubojozariro.pdfIn PDF document text
- https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bd1a0aca0c3---nedufomitopejute.pdfIn PDF document text
- http://mega.kz/media/upload/files/fonokujomifuwopipe.pdfIn PDF document text
- http://anandtouristcorporation.com/uploads/vulerediludepened.pdfIn PDF document text
- http://www.mecateengenharia.com.br/ckfinder/userfiles/files/mufimedazejexukupolex.pdfIn PDF document text
- https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/19e15fe627f552d7299824711c0f94fb/vagidisivimoxovepem.pdfIn PDF document text
- http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/pq8pisn8jl0lmu288443d583e7/38179296325.pdfIn PDF document text
- http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c54a15e23c---jopabapolazusok.pdfIn PDF document text
- http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adab7636459---26635872965.pdfIn PDF document text
- https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/td8omps489bm6fii56c9kg0au1/12533325758.pdfIn PDF document text
- https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aecd5529e7---39551511106.pdfIn PDF document text
- http://mariopresto.pl/userfiles/file/totidudu.pdfIn PDF document text
- http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f1724ad53---89021885296.pdfIn PDF document text
- https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f63f2f8e3f6---62285060072.pdfIn PDF document text
- http://voxel-avocats.fr/uploads/file/75609510982.pdfIn PDF document text
- https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16082fc648bdb2---15474179152.pdfIn PDF document text
- https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/d44eeb37d77b7502ccd1d42b810125b4/ledebezafedi.pdfIn PDF document text
- https://betenrealestate.com/sites/default/files/file/jipimumevisurulatep.pdfIn PDF document text
- http://biolabsrl.org/userfiles/files/bujubutozulukatuvupejur.pdfIn PDF document text
- https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a96c8dff30---zofofidisofovezodiwara.pdfIn PDF document text
- http://moreit.ch/productinfo/file/16749947320.pdfIn PDF document text
- http://chataphan.com/file_media/file_image/file/joweb.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_off0000f6c6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6C6	16468 bytes
SHA-256: `de82f62172d05e45ae751d0c269d43c2911cd7c3c97dc2a100a887359158cef2`
`font_01_sfnt_off00012183.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12183	10948 bytes
SHA-256: `d6f71ea698a96c53d31be0bbeb47dda095e86f29f265f08f298694ce23e8577e`
`font_02_sfnt_off00013aca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13ACA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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