PDF malware analysis — malicious · 1e603c6ca022265c

MALICIOUS

PDF

89.4 KB Created: 2021-09-17 01:04:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 2e417b1235e29d7dd147d6bc655e3ddd SHA-1: 3f44a0b345277e6d270579d3f0739357904aea55 SHA-256: 1e603c6ca022265c2d0b7bf10ac098cf38b6254592a2de8c96d23b91319d3c67

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to host malicious files or redirect users to phishing sites. The presence of external URIs and the nature of the link farm indicate a likely phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9913

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://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/2bf48fbbaff2152b8683d9912d046f18/rigonutesitedur.pdf In PDF document text
- https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16133ce9ed1707---bofaxim.pdfIn PDF document text
- http://huile-de-nigelle.info/userfiles/file/43140913747.pdfIn PDF document text
- https://lexcochoralsoc.org/demo/lccs/beta/userfiles/files/zufeludodisunakatamitima.pdfIn PDF document text
- https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16135bb57a85a4---zefajegavujuxugo.pdfIn PDF document text
- http://alajwakh.com/uploaded_files/userfiles/files/3521002129.pdfIn PDF document text
- https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/a7m6j1ic0bungo0uu04366b1jt/bodelemigadexekinifologew.pdfIn PDF document text
- https://cochleartudaskozpont.hu/files/zuvukidavuxezivazam.pdfIn PDF document text
- https://dom4m.lv/userfiles/files/69658049098.pdfIn PDF document text
- https://ewt.cz/res/file/75288951719.pdfIn PDF document text
- https://www.hasmow.com.au/application/third_party/ckfinder/userfiles/files/9327693495.pdfIn PDF document text
- https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/gevrl97ac61m960fb67hcgavlb/64859108378.pdfIn PDF document text
- http://www.valathors.com/ckfinder/userfiles/files/79009985792.pdfIn PDF document text
- http://cp-1.ru/userfiles/files/vupenobared.pdfIn PDF document text
- http://ge-mak.com/files/jenipotunonikadunuposat.pdfIn PDF document text
- http://cz-synergy.cz/data/file/bosilukevipoluza.pdfIn PDF document text
- http://millecolori.it/images/file/79544172912.pdfIn PDF document text
- https://undergroundtakeout.com/userfiles/file/44344087659.pdfIn PDF document text
- http://sswjeans.com/files/2257351992.pdfIn PDF document text
- http://www.agenbenangbandung.net/file/difadotegowaxevake.pdfIn PDF document text
- http://www.biharikft.hu/bihari-admin/ckfinder/userfiles/files/sigoropibekimirezofozowa.pdfIn PDF document text
- http://arcenevents.nl/site/upload/files/23651559171.pdfIn PDF document text
- http://lesen-und-schenken.de/userfiles/files/vovuraparakeko.pdfIn PDF document text
- http://tipsclubcr.com/campannas/file/69124195361.pdfIn PDF document text
- https://bongkartuantakur.com/contents/files/numaravolowabo.pdfIn PDF document text
- http://associatedreclaimed.com/userfiles/files/superisedar.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=how+can+i+find+out+who+stalks+me+on+instagramPDF 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_off0000f67b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF67B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010e8d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E8D	18316 bytes
SHA-256: `4686380d8d38d961b0d78b0e06751ad8c85a0cc370e45c1c9b29be6ce8fdc943`
`font_02_sfnt_off00013db8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13DB8	11192 bytes
SHA-256: `e78486093e64f8e1807dd3c6b4b41662dccce4a81726a83e03140ed024e560fd`

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