PDF malware analysis — malicious · b226cf06310e3da3

MALICIOUS

PDF

72.2 KB Created: 2021-09-18 23:54:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 403575abcdfd8fe6d0b94bdbbe3a3898 SHA-1: ca8b7e27f91f925720115dea0ed1fa81a0faef94 SHA-256: b226cf06310e3da3f8b7c747cab9b3162625702dcf55be6dd0680f8dd8a8e57d

164 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript which is a strong indicator of malicious intent, likely to redirect the user to a malicious URL. The presence of numerous links to compromised websites and disposable hosting further supports a phishing or malware distribution campaign. ClamAV also detected this file as Pdf.Phishing.Trojan.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

Heuristics 7

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.
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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 https://archism.ru/uplcv?utm_term=iron+body+kung+fu+training+pdf PDF link annotation
- http://whuntex.ru/userfiles/file/guranokedubojirugerasuni.pdfIn PDF document text
- http://huerural.com/uploads/image/files/giragubegezinazi.pdfIn PDF document text
- https://eastmanllc.net/ckfinder/userfiles/files/36890990557.pdfIn PDF document text
- http://highdesertrent.com/newsite/images/uploads/file/68780166993.pdfIn PDF document text
- http://kkagro.com/media/images/upload/file/soxejoxufanegajefesizulib.pdfIn PDF document text
- https://benhgout.net/uploads/Files/file/fisemixizurugarutuzax.pdfIn PDF document text
- http://e2ingenieros.com/ckfinder/userfiles/files/tilogugafisibipigejegun.pdfIn PDF document text
- http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16143520551769---jokevijedeputafin.pdfIn PDF document text
- https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/mjr35145nu5pk6p4vv2jksl4v5/93636441321.pdfIn PDF document text
- http://sl-light.ru/design/img/upload/file/71422053493.pdfIn PDF document text
- http://szkolaprzybranowo.pl/ckfinder/userfiles/files/xavazisekosuzimel.pdfIn PDF document text
- https://deitratech.com/userfiles/file/55260555268.pdfIn PDF document text
- http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/17012146972.pdfIn PDF document text
- https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/v9ah6m21nrt0740tal4mogckj0/wudofebaxip.pdfIn PDF document text
- http://fonnepal.org/userfiles/file/lemudibumasofe.pdfIn PDF document text
- https://adetexfoamgroup.centralcms.cloud/galeria/files/wadujipukuxego.pdfIn PDF document text
- https://prestinieurope.ch/userfiles/files/jutita.pdfIn PDF document text
- http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613af2568785b---patedapetetalepovososajeb.pdfIn PDF document text
- https://georeno.ca/userfiles/files/19757829129.pdfIn PDF document text
- http://cafehinglung.com/uploads/files/9341412344.pdfIn PDF document text
- http://m3hotels.com/userfiles/file/tuluxujex.pdfIn PDF document text
- https://ewastexperts.com/userfiles/files/jatozelobolevumogavaru.pdfIn PDF document text
- https://mamotato.ro/userfiles/file/xeterip.pdfIn PDF document text
- http://dedanskecasinoer.dk/userfiles/file/65657297587.pdfIn PDF document text
- https://tuoitre.bacgiang.gov.vn/lib/ckfinder/files/59929831416.pdfIn PDF document text
- 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_off0000ba03.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBA03	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d215.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD215	16016 bytes
SHA-256: `db9aa983e363a82238b6aea6e7b4feec1107222078c1c8d1cdf71d57801c7d41`
`font_02_sfnt_off0000fae5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFAE5	10724 bytes
SHA-256: `6d79fd960090576f6495d006bc9abcea2119df849c681df346861da1b4b2df6f`

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