PDF malware analysis — malicious · 553e164041db5871

MALICIOUS

PDF

92.6 KB Created: 2021-06-27 00:19:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: fb7236b6e4b36484a5d49c0c5bf52330 SHA-1: 6facdd48d1235e2f881eeefbf8ab9207e85df88a SHA-256: 553e164041db58711aacbdb22160fe459d95267e77ac634464d802f24336cc79

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and potentially disposable hosting domains. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to exploit vulnerabilities or lead users to phishing/malware sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

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://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a02dfe710e---zolibakiwuguve.pdf In PDF document text
- http://security-m.jp/tool/images/file/718657407.pdfIn PDF document text
- https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/ebac3c4100fbb3641de03affdf1c5101/67750723114.pdfIn PDF document text
- http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d19d2d1845---lagelesorir.pdfIn PDF document text
- https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/79b681e2297a9ffad32d31b004e779ed/12627877927.pdfIn PDF document text
- http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/169si9v8gph0923rsemj5ub710/78373739777.pdfIn PDF document text
- https://egyiksem.hu/uploads/file/78151191108.pdfIn PDF document text
- http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/8f7klg11j6hi5ekr5vqnaq80n6/mexemebaru.pdfIn PDF document text
- https://drlanda.hu/user/file/56244845462.pdfIn PDF document text
- https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5472672b6b---tamepanuwub.pdfIn PDF document text
- https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/8c7f4727187f756d50697855c71eaa7e/vutukiwa.pdfIn PDF document text
- http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/9iaphnajd0qs7kdngr9gu43bk5/17221956314.pdfIn PDF document text
- http://orgue-chantepie.info/FCKeditor/upload/file/vefelekoliwobun.pdfIn PDF document text
- https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/3mgelrl7ie92h1vovbbq459ukj/81597363991.pdfIn PDF document text
- http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/eae5af0cfebe12bffbe2b3f9ba2f869e/gonaji.pdfIn PDF document text
- https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/4565e41ca1f18b86da056f09c7711aeb/returu.pdfIn PDF document text
- http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/mulevagojaralinumudok.pdfIn PDF document text
- https://rumputhijau.com/contents//files/buduxokilupamozawijobibi.pdfIn PDF document text
- https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/ecdcb6d776f14e2e676e115fefcf0323/85878903738.pdfIn PDF document text
- http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/o9lchaucs4m9lkqm1pfrqr4nd7/89457069776.pdfIn PDF document text
- http://brette-animation.com/userfiles/file/lonuzulalizejujeg.pdfIn PDF document text
- http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ff573c3e8---71278237455.pdfIn PDF document text
- http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f254827d7c---57903064936.pdfIn PDF document text
- https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b629edd4db0---sajigosatot.pdfIn PDF document text
- https://alatheir.com/atheirwsfiles/file/kemovenoludagiman.pdfIn PDF document text
- http://vce34.ru/attachments/file/84570349561.pdfIn PDF document text
- http://qtjdb.com/UploadFile/2021/05/17/file/20210517_193221_176.pdfIn PDF document text
- https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/3c1191b7f7ecf55e3936d3567e1c52ff/45909856338.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=operation+research+book+pdf+for+mbaPDF 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_off0001052d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1052D	17576 bytes
SHA-256: `164889f716eb7442e4c0b28cf67bbdd67585966a28dcae1ef3c94a55a8702157`
`font_01_sfnt_off00013354.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13354	11096 bytes
SHA-256: `4e5273a63df75b5ae0e635a21e33241b4bfbed64b5efac79391708a4e5afcf4d`
`font_02_sfnt_off00014cce.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14CCE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.