PDF malware analysis — malicious · 46674b9f16b7599c

MALICIOUS

PDF

79.8 KB Created: 2021-09-21 06:38:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: bfeef583671b5296ec929c3187f6ba16 SHA-1: a07f2ec24f57fa4bb1a2e13e0095f8cae7fe61af SHA-256: 46674b9f16b7599c68b235d2d46253246185bddd9b211a0231b24c2e2a899ec0

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link farm hosted on multiple compromised websites, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and heuristic firings point towards a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://kanalizace-ul.cz/userfiles/file/2106465260.pdf In PDF document text
- http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141dd2713c61---damivadugi.pdfIn PDF document text
- https://leresto-niort.fr/images/userfiles/files/dibotivawajelisamewebo.pdfIn PDF document text
- http://abpjse.news-read.com/upload/files/kajarabisubiralusedomin.pdfIn PDF document text
- http://xn--80aatg4aaaddkhfhbf3evf.xn--p1ai/ckfinder/userfiles/files/74298143000.pdfIn PDF document text
- http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614296e9e2f91---70219619466.pdfIn PDF document text
- http://rococosofa.com/files/files/92431656884.pdfIn PDF document text
- http://summitremodelinginc.com/userfiles/files/52370147584.pdfIn PDF document text
- https://jnvhardoi.org/ckfinder/userfiles/files/vaxilusijuw.pdfIn PDF document text
- https://cevhertemizlik.com/userfiles/files/47715204784.pdfIn PDF document text
- http://myxroad.net/upload/userfiles/file///mukeragerumumuzubofemopul.pdfIn PDF document text
- http://www.serenissimaservizi.com/files/19681418244.pdfIn PDF document text
- https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16144fa5f71d7f---nupufizugexuni.pdfIn PDF document text
- http://giasuthanhdat.vn/Images_upload/files/82865281724.pdfIn PDF document text
- http://agavietnam.com/img/files/70291839154.pdfIn PDF document text
- http://lideparts.com/userfiles/file/1630932880.pdfIn PDF document text
- http://smeeing.com/userfiles/files/49865338548.pdfIn PDF document text
- https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134bcd2e6c43---didudigavarafukebiper.pdfIn PDF document text
- https://temahr.hr/files/linivukozezidufobafiti.pdfIn PDF document text
- http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f53ce91704---79700377841.pdfIn PDF document text
- http://gt-outillages.fr/ressource/site-image/files/70291305887.pdfIn PDF document text
- https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/161353790c4488---87905947990.pdfIn PDF document text
- http://print-printonline.com/ckfinder/userfiles/files/70471544652.pdfIn PDF document text
- https://thehideawayresortpattaya.com/userfiles/files/pujaxavezitufoguwi.pdfIn PDF document text
- http://stefanourso.com/public/userfiles/file/jipatunuwekure.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=solid+explorer+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_off0000ce34.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCE34	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e64b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE64B	10284 bytes
SHA-256: `2839f92f19c48295bd00d423c8e5e09b2ca8d2955c838ad7fdd90f7c3d88f2f4`
`font_02_sfnt_off0000fd86.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD86	19944 bytes
SHA-256: `6c2b5077703b9faa0e9ba260865334c8dd44fc1242e6a7ae2fb643e631077b62`

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