PDF malware analysis — malicious · 9c09baf3f1e1271d

MALICIOUS

PDF

68.4 KB Created: 2021-09-27 04:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: ab417c7ca782983f28aeb5cc4c2cdd7b SHA-1: 4fbfaa6628fef003ab67fbac102bace0f032af5a SHA-256: 9c09baf3f1e1271de74d2457cfe3b67d05c5a2f8be30f9eba65c096918b00580

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely intended to lure users to malicious content. The presence of multiple PDF link farm heuristics and a high ML score indicates a strong likelihood of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9968

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 http://actinq.nl/upload/file/24412534073.pdf In PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614da3abc825d---35882797818.pdfIn PDF document text
- https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/02ef1785ee428719b4309ad6673f1e24/datamekelubukoji.pdfIn PDF document text
- http://cornucopiafrederick.com/uploads/files/47864099315.pdfIn PDF document text
- http://tichdiem.surecare.vn/uploads/userfiles/file/52129370402.pdfIn PDF document text
- https://smwebtechnology.com/arishayurveda.com/userfiles/file/voxupegevelifujoves.pdfIn PDF document text
- http://beautifulmoda.com/userfiles/files/48875449891.pdfIn PDF document text
- https://eprobatdz.com/ckfinder/userfiles/files/37986958379.pdfIn PDF document text
- http://ettermanenterprises.com/ckfinder/userfiles/files/lagifoxuzisomunozabowajoz.pdfIn PDF document text
- https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/22ih94s8akal5r7epjsj70sju4/26723398946.pdfIn PDF document text
- https://edu-mate.kr/_UploadFile/Images/file/43657546339.pdfIn PDF document text
- http://radecznica.pl/userfiles/file/28887298616.pdfIn PDF document text
- https://mytopics.it/uploads/file/pazuf.pdfIn PDF document text
- http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141929a832d9---39946420565.pdfIn PDF document text
- http://geerhannutpourreussir.be/docs/upload/files/vomuzegugesokawidiwugoju.pdfIn PDF document text
- http://sandsflooring.co.uk/ckfinder/userfiles/files/sivifufikotozufuwaxixu.pdfIn PDF document text
- http://automozg.by/upload/editor/files/bugovab.pdfIn PDF document text
- http://shinies.ru/img/lib/file/puvodasas.pdfIn PDF document text
- https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16130de7a443cb---tomaxakezinojonelaluxof.pdfIn PDF document text
- http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1614293c5a5819---javutepugoputoxaxosusuz.pdfIn PDF document text
- https://www.terraton.com.my/ckfinder/userfiles/files/deresutebugekazoxade.pdfIn PDF document text
- https://hyosungulf.com/uploads/file/2328535287.pdfIn PDF document text
- https://optimuselearningschool.com/learning/site/images/uploadfiles/suvavi.pdfIn PDF document text
- https://ppntassone.it/dati/upload/file/67818525342.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=gta+roleplay+apkPDF 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_off0000b069.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB069	14576 bytes
SHA-256: `16217909d0bd7fdda4e063f202bfde94d3817f4f2f0347ba307511009e13b733`
`font_01_sfnt_off0000d56a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD56A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000ed81.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED81	10128 bytes
SHA-256: `62e24dfc5cde05ae3c52397c1c7fe0003d0844f9c2b302d0bc7e786bd0ee1df6`

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