PDF malware analysis — malicious · cd186f299eca33dd

MALICIOUS

PDF

83.1 KB Created: 2021-09-12 21:31:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 7b38b35c8edbd1a223453a64afa2e903 SHA-1: 1292f0e4b80583a3024630f1b89f1721588bd9fe SHA-256: cd186f299eca33dd98551fd0a1489c41e4b9d5bffdbb33bacb70a569a3527eec

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, directing users to multiple external URLs, several of which are hosted on compromised WordPress sites. The presence of embedded URLs and the overall structure suggest an attempt to direct users to potentially malicious content, likely for phishing or malware distribution. No scripts were extracted from this sample.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16138de4a16d99---gewokomo.pdf In PDF document text
- https://intrastorg.com/userfiles/file/14302487743.pdfIn PDF document text
- https://altonika.pro/files/fck/file/nopojafulir.pdfIn PDF document text
- http://thangmayedex.com/webroot/img/files/fimutirapira.pdfIn PDF document text
- http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/95977743313.pdfIn PDF document text
- https://carpenterstouchnj.supremeroi.com/FCKeditor/file/35170234751.pdfIn PDF document text
- http://planao.com/ckfinder/userfiles/files/34477796277.pdfIn PDF document text
- http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613052a092937---gipekidapimifenipakikaj.pdfIn PDF document text
- https://groupunsur4.com/contents/files/zepitijobotebizo.pdfIn PDF document text
- http://lindendirect.com/tempimg/file/30591793304.pdfIn PDF document text
- http://www.espaciocultivarte.com/ckfinder/userfiles/files/22306578388.pdfIn PDF document text
- http://thewellmanteam.com/userfiles/files/62520976280.pdfIn PDF document text
- http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138f770cf247---foroforagazigot.pdfIn PDF document text
- https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/c9ad3bc9a6dd3f5a9e7f625c14be1481/mekalezugu.pdfIn PDF document text
- http://frutapacargentina.com/ckfinder/userfiles/files/66610784294.pdfIn PDF document text
- https://shih-tzu.ro/files/file/77856185252.pdfIn PDF document text
- http://www.agenbenangbandung.net/file/14666038631.pdfIn PDF document text
- http://deauville.ru/files/file/49791443071.pdfIn PDF document text
- http://chuanghuilaw.com/filespath/files/20210904193221.pdfIn PDF document text
- http://deaprogettazioni.it/userfiles/files/98552376724.pdfIn PDF document text
- http://atek-ent.com/upload/file/fozotewuxatukelafedagoz.pdfIn PDF document text
- http://ylplj.com/ckfinder/userfiles/files/78522287186.pdfIn PDF document text
- https://firsatpin.com/calisma2/files/uploads/gapibexululo.pdfIn PDF document text
- https://mavibusiness.it/file/47227999616.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=george%27s+marvellous+medicine+read+online+freePDF 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_off0000df03.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF03	17608 bytes
SHA-256: `6fb6eabe068ee2943853172351f366e97cf2b85ee4ff3c2e54442f44bff56426`
`font_01_sfnt_off00010ce0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10CE0	10960 bytes
SHA-256: `b3441c3496a5aa496dfbdad83628620eb2c61797719532a6e225e92089e3a5ee`
`font_02_sfnt_off0001262a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1262A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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