PDF malware analysis — malicious · f0ed25dcc53021f4

MALICIOUS

PDF

68.6 KB Created: 2021-09-25 13:20:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 1816b4c4abb9764a682f45f702cfa276 SHA-1: abd77d6533c645d3039378b0969b258ee5a4d521 SHA-256: f0ed25dcc53021f45b05c42c3d2caeffa6f91077f2520ae8b6086aa9b2fa8d7f

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains JavaScript actions and numerous embedded URLs, suggesting it's designed to redirect users to potentially harmful external sites. The presence of JavaScript points to an attempt to execute code within the PDF viewer, likely to facilitate further compromise.

Machine Learning

Nyx PDF Classifier malicious score 0.9956

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 https://tivicom.vn/upload/files/pubuzolo.pdf In PDF document text
- https://www.pension-chevaux-haras-gabereau.fr/ckfinder/userfiles/files/dokuwuxuwoludi.pdfIn PDF document text
- http://klasykarozrywki.pl/public/images/fck/file/fikirujavubomok.pdfIn PDF document text
- http://101-games.ru/images/uploads/files/84195425944.pdfIn PDF document text
- http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16131c592ef0db---98876158266.pdfIn PDF document text
- http://www.madiran-cruduparadis.fr/ckfinder/userfiles/files/60012964520.pdfIn PDF document text
- http://brenna-ski.pl/userfiles/file/77829232845.pdfIn PDF document text
- https://newtech-utm.pl/userfiles/file/6704740636.pdfIn PDF document text
- https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ddeaf3fe4e---97912801107.pdfIn PDF document text
- http://www.sctiec.com/up_files/FCK/file/84056217171.pdfIn PDF document text
- http://palmdale.thepokeluau.com/uploads/files/73945960919.pdfIn PDF document text
- https://triptoboloyfoundation.org/editorsfiles/files/naxobazabineso.pdfIn PDF document text
- http://liavanhaeringen.nl/userfiles/files/feturemotaruwizakesi.pdfIn PDF document text
- https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/dajop.pdfIn PDF document text
- http://piri-piri.pl/ckfinder/userfiles/files/noredabute.pdfIn PDF document text
- https://nyig.com/files/file/74925365063.pdfIn PDF document text
- http://ei-windykacja.pl/upload/file/finexosatunozisipure.pdfIn PDF document text
- https://baxsporthorses.nl/userfiles/file/zimagezawuzafidurokaw.pdfIn PDF document text
- http://aisne.proximeo.com/ckfinder/userfiles/files/lenevowitosuvutulul.pdfIn PDF document text
- http://group-anons.ru/userfiles/files/xugarokidaja.pdfIn PDF document text
- http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/miwoxodilab.pdfIn PDF document text
- http://trieuduong.com/images/Download/49387400539.pdfIn PDF document text
- https://sunnyvale.com/wysiwygfiles/file/79914012857.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=what+makes+apple+better+than+samsungPDF 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_off0000ad9f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAD9F	10812 bytes
SHA-256: `0032226b70a3737bf9b79b5bb2b64c5337bed676cb8d4042e7d5c4e4d8a0bc2b`
`font_01_sfnt_off0000c628.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC628	15428 bytes
SHA-256: `adb867e601edad6716d1492ac6128259c552bcefadbd3cb51704026a82807024`
`font_02_sfnt_off0000ecdb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xECDB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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