Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb4d59c8f9e07a6b…

MALICIOUS

PDF

80.2 KB Created: 2021-09-07 00:28:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 08193550c76495a06808b06876683f31 SHA-1: ce47b5bb004865a06612a217e31c8f730254bc3c SHA-256: eb4d59c8f9e07a6b3b859e003b74437dbb7db7c0f3a5118fc648c1e83bb2e98c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS uploads. This suggests a phishing or redirection scheme designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://sumnerclassof1976.com/clients/4/49/49b54eafcc86ae0c30eb104ab8b91c7c/File/38798489115.pdf In PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/8493f811221b7075659215d74119ac98/tekiribugugebaw.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/uqm64fs0ne389dbafecsjfgtgp/nuwenewoxoxusib.pdfIn PDF document text
    • http://landbondcorten.com/attachment/file/740bb2f4c88ae5ac48874c7acce32e81.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/92382470141.pdfIn PDF document text
    • http://gamebonda.com/ckupload/files/fibijused.pdfIn PDF document text
    • http://puppiesulove.com/clients/7/7f/7fa6d7836ea929643a3c23f4562b158d/File/vibiwegukimipojopijawo.pdfIn PDF document text
    • https://ourcampuswindow.com/ckfinder/userfiles/files/femegabasavazef.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160814352ba914---depuwixiboke.pdfIn PDF document text
    • https://kurtwohndesign.ch/userfiles/files/muzivuragew.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccb83a18a7c---40825779261.pdfIn PDF document text
    • http://trustycctv.com/ckfinder/userfiles/files/42774022467.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/64989280568.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16125695ecc123---gibejojajozogolapilizegoj.pdfIn PDF document text
    • https://artenika.pl/fck/file/14188691084.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb6b1971a1---didedix.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/zisodi.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132ad5cd7ef5---78796050348.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/19059868498.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb1935851a3---96071769107.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086daba2a5b3---68305441167.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/92224200160.pdfIn PDF document text
    • http://biplano.eu/userfiles/files/texebiduvupunaxetexalu.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/xajevexasezaburobifo.pdfIn PDF document text
    • http://chanakol.com/ckfinder/userfiles/files/48914177209.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8d6282d3e---raveninile.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=biblia+jerozolimska+pdf+chomikujPDF 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.

FilenameKindSourceSize
font_00_sfnt_off0000d954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD954 11256 bytes
SHA-256: 3debafe042eed0f12dc9e93ca28e6befe4762528483a0f5e9705be7ee92535b1
font_01_sfnt_off0000f385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF385 15856 bytes
SHA-256: 934f27200f749c20ae6732241b457a90c5d1a3f8aeb50ca5d725ab4348112433
font_02_sfnt_off00011adb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ADB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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