PDF malware analysis — malicious · ec87a5226a823085

MALICIOUS

PDF

111.2 KB Created: 2021-09-09 23:54:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: 7fe4d3f155310597571f6d3d0140e61d SHA-1: 5abd6e218e5f8cf988ddc70d9a4f3bb635d8cb48 SHA-256: ec87a5226a8230855b5fd11d5fd8f4302e2c87a43f8af2d83e756360ed553929

134 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious actions within documents. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous external URIs, many pointing to PDF files on potentially disposable domains, suggests a phishing or malware distribution campaign. The JavaScript action likely facilitates the redirection to these external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9953

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
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 http://liveranigioielli.it/userfiles/files/16475033901.pdf In PDF document text
- http://offerseir.com/basefile/offerseircom/files/nazusofapeluxukage.pdfIn PDF document text
- http://rockhousemethod.com/ckfinder/userfiles/files/kuzuzidaku.pdfIn PDF document text
- https://mvpartners.be/images/uploadedimages/file/kanutosulodejito.pdfIn PDF document text
- https://lemarko.com/userfiles/file/53841785602.pdfIn PDF document text
- https://galaxytraining.examinationonline.com/files/vefewesofufazazod.pdfIn PDF document text
- http://odesignlab.ru/admin/ckfinder/userfiles/files/retotulajuseralutuda.pdfIn PDF document text
- http://ekogamma.pl/javascript/ckfinder/userfiles/files/jasave.pdfIn PDF document text
- http://viviapalermo.com/userfiles/files/33044704658.pdfIn PDF document text
- http://www.adarshvidhyasankul.org/userfilesfile/lomisevebexa.pdfIn PDF document text
- https://renesens21.com/ressources/upload/files/36341035666.pdfIn PDF document text
- https://leosservices.com/userfiles/file/wukanivilofoxalivawalowo.pdfIn PDF document text
- https://sedefartphotography.com/resimler/files/92478123959.pdfIn PDF document text
- http://vindindex.nl/images/uploads/44176954031.pdfIn PDF document text
- https://angkalaris.com/contents/files/pazuruki.pdfIn PDF document text
- http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131bb88f1825---jesakanaveviware.pdfIn PDF document text
- http://burbank.kopanramen.com/uploads/files/95875520678.pdfIn PDF document text
- http://foxadv.net/file/78534305655.pdfIn PDF document text
- https://kimcert.org/E/file/suburudafiduv.pdfIn PDF document text
- http://abwclayton.com/uploads/files/difugekojaxijomimi.pdfIn PDF document text
- https://jin-ji.com/upload/files/56333270715.pdfIn PDF document text
- https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613356a0cba66---46397325276.pdfIn PDF document text
- http://yujinpharma.com/upload/files/89676017599.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=metal+gear+rising+androidPDF 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_off00014ad9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14AD9	10416 bytes
SHA-256: `641e03a92e7bdd9b7c5f3f2b9167e441e869361bd142dcd09744e5c3de3ab297`
`font_01_sfnt_off00016259.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16259	20276 bytes
SHA-256: `2fe48e71b4246222fbe5055d81dfd863860d3e6816a5227d4ae15d79737c0308`
`font_02_sfnt_off00019774.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x19774	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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