PDF malware analysis — malicious · 78dc1032b7bf9c51

MALICIOUS

PDF

87.5 KB Created: 2021-09-24 09:50:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 82df20e6f014bf372e0c3b28c5335f54 SHA-1: 91b7351d373407d89895163218a6b1139cbec0e2 SHA-256: 78dc1032b7bf9c51e424ef1d2c6a47d26bb645e7e5c3a4d28d84a419773b49c0

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9934

Heuristics 5

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.
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://goldenlinejsc.com/userfiles/file/jikelezefewis.pdf In PDF document text
- http://tsnpharma.com/upload/files/59184274398.pdfIn PDF document text
- https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/23049335641.pdfIn PDF document text
- http://stillincontact.com/images/mails/file/jovogebuxaporufudusazob.pdfIn PDF document text
- https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614736fd8ba38---42242756902.pdfIn PDF document text
- http://vallovin.it/userfiles/files/10789617581.pdfIn PDF document text
- http://farmaciafasolis.eu/userfiles/files/zifetifapajapu.pdfIn PDF document text
- https://abcelectricalonlineshop.brilliantwebtech.com/userfiles/files/tabisemimixuwunaxip.pdfIn PDF document text
- https://nepalmicrofinancesummit.org/userfiles/files/5849140752.pdfIn PDF document text
- http://www.tiande-global.com/ckfinder/userfiles/files/10549270202.pdfIn PDF document text
- http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/puwesosebokadadotu.pdfIn PDF document text
- https://aprenda-atdi.com/uploads/files/wogadujijikefejumapabo.pdfIn PDF document text
- http://colorfusion.us/admin/images/file/25474927618.pdfIn PDF document text
- https://gadd-asso.org/userfiles/file/pasevugurikubobili.pdfIn PDF document text
- http://itcbeautytrainingschool.com/userfiles/file/tewiw.pdfIn PDF document text
- https://romalasergroup.com/userfiles/files/zirarexolopipozaga.pdfIn PDF document text
- https://b2b-intelligence.it/uploads/file/wofetuzexuf.pdfIn PDF document text
- https://cowichanseniors.ca/userfiles/file/wifurojuwupiwowu.pdfIn PDF document text
- http://terralis.net/catalogue_dynamique/file/paburipizulokev.pdfIn PDF document text
- https://synersys.fr/contenu/file/dobogixufelenokofi.pdfIn PDF document text
- http://skulpt.in/admin/uploads/file/68676507165.pdfIn PDF document text
- http://modnyi-buket.ru/uploads/files/72844901553.pdfIn PDF document text
- https://xn--80apefbdm9ah5g.xn--p1ai/userfiles/rejasofivifodigen.pdfIn PDF document text
- https://satnamunicipalcorporation.com/admin/ckfinder/userfiles/files/46683155137.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=star+wars+the+last+jedi+123moviesPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d957.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD957	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f16e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF16E	11112 bytes
SHA-256: `3b52a6eb96c55166101e208176d55ee6ce06af322762a5f20241da4661fc3c0c`
`font_02_sfnt_off00010b71.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B71	16616 bytes
SHA-256: `06f1d5f5a9083a80364da0885936c8ddb2848b41a67694407b5e75bff462a068`
`font_03_sfnt_off000122b4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x122B4	17680 bytes
SHA-256: `9103e72b51eaafe1968c3c93179b9f52265d7b64362e68f055eeaed1e30ad19f`

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