PDF malware analysis — malicious · 8a49f283958132f1

MALICIOUS

PDF

82.8 KB Created: 2021-09-05 23:32:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: f97a2561826741979d529a58c4602379 SHA-1: c01dca75e9f5e392ed98e12e12ee4d1f370fc5de SHA-256: 8a49f283958132f15e3727b505b69746581ec6db64680c7f7ed687c5c2f72d88

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. The document contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the nature of the links indicate an attempt to lead users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

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://kuppersbusch.hu/userfiles/files/modepulugejotepegefetir.pdf In PDF document text
- https://printsolutions.ro/uploads/wysiwyg/files/wafag.pdfIn PDF document text
- https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/6f5945a14cf1d697f5f748305a16f51b/26456462445.pdfIn PDF document text
- http://arcdesantmarti.com/biocop/Images/images-editor/file/94602743703.pdfIn PDF document text
- https://consultingexpert.eu/fckeditor/userfiles/file/36667872693.pdfIn PDF document text
- https://o-dance.com/upload/files/6906906283.pdfIn PDF document text
- https://85097781.com/upload/files/dimijexodugozipizugaw.pdfIn PDF document text
- https://cnn-logistics.com/asset/files/30711529216.pdfIn PDF document text
- https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a20f447829d---39099647181.pdfIn PDF document text
- http://pinturasoltra.com/images/slider/files/joben.pdfIn PDF document text
- https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606d291d123e2---wezizulowubevifoligugewok.pdfIn PDF document text
- http://a-pluset.com/userfiles/valoxasomepujadukasev.pdfIn PDF document text
- https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/k8mse9m8it7elr2ednddnhgdd5/23321330252.pdfIn PDF document text
- https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c96e60a55af---46245907191.pdfIn PDF document text
- http://amtutoring.com/clients/865321/File/xigoxot.pdfIn PDF document text
- http://pjteam.hu/uploads/56379024673.pdfIn PDF document text
- https://annjulieskarpmo.com/userfiles/file/95059271562.pdfIn PDF document text
- https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c3489fd9204---44929537324.pdfIn PDF document text
- http://bienbao.net/uploads/files/lakiloxozosevo.pdfIn PDF document text
- https://qqhanoman.com/contents//files/xitupapifasinojiti.pdfIn PDF document text
- http://aaaexpressheating.com/userfiles/file/9675421934.pdfIn PDF document text
- http://change-sexy.com/files/files/zafokadaxupalatebokiraxos.pdfIn PDF document text
- https://eniedu.com/data/file/20210803202030.pdfIn PDF document text
- http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160786d7f19cf4---82368760544.pdfIn PDF document text
- http://fitviewer.biz/files/file/66251291761.pdfIn PDF document text
- http://qazaqbanki.kz/data/content/files/25411391574.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=coumadin+diet+pdfPDF 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_off0000ddd5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDDD5	10476 bytes
SHA-256: `70fc97b47a28050c14a79a9ec7297ad673a67b17263e437b5d036f722eb9b4a2`
`font_01_sfnt_off0000f59c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF59C	18784 bytes
SHA-256: `63092508426772b7552364a36e8813fa9b27a09e05fd8924f6c692b4304cb1c1`
`font_02_sfnt_off00012549.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12549	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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