Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dbea7174b42c4c2…

MALICIOUS

PDF

86.0 KB Created: 2021-06-26 03:58:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 4c4204ccaebd2ea53866445c3a6cb125 SHA-1: 34592b4c4671c5c2c9e8a85d95cfc1dc6ddca3aa SHA-256: 0dbea7174b42c4c2f40e361944f4fb457928b98b261905c12523e718b3ecc0c3
204 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple URLs pointing to compromised websites, indicating a malicious intent to deliver a payload. The 'Clipboard command execution lure' heuristic strongly suggests the document instructs the user to execute commands, likely to download and run a second-stage exploit or malware. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. 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://librojuridico.com/aym_images/files/siwotig.pdf In PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/o81s2rtqi7mk0pdk4ubk1d0bqk/lezireseboxefiv.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/6071799169.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608206ce52ee5---fukogizuvusaresi.pdfIn PDF document text
    • https://coimbatorepressclub.com/FCKeditor/userfiles/file/98857419422.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607597141a0b5---sosodamalodojezokugino.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e711388c55---2577164580.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/22f262ad042320f09c91d012882e71f5/38876976996.pdfIn PDF document text
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/belametozim.pdfIn PDF document text
    • http://k-souz.com/userfiles/file/22103956349.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3614936ab---gumijimimakitagemidag.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/ed20841c12f14279fae7a8dd7b03b09d/34604887411.pdfIn PDF document text
    • http://0965818789.com/CKEdit/upload/files/77432437064.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607097fb35eb3---mojipalozufojojo.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a02d133bb1---kazibozopovanifake.pdfIn PDF document text
    • https://kp-bs.ru/upload/files/tuwifanironoduxez.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/gosajutetoxufij.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/595c9d837f31a2d53ae6bdb0ab9953c4/50706697626.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b27a669c925---57254187432.pdfIn PDF document text
    • https://sfasg.jp/js/ckfinder/userfiles/files/99924166527.pdfIn PDF document text
    • http://nsfeed.com/_UploadFile/Images/file/manojuguzekebiwusixub.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/cb00a4c434267cbf7a59a8360e526516/debokaniwesatubasovuguso.pdfIn PDF document text
    • http://breakevenpoint.pl/uploads/editor/file/rirenusawodo.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c0253ee33c5---torurajajuseguvegofu.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/63926251603.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=rip+dvd+to+isoPDF 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_off0000ef9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9C 17248 bytes
SHA-256: 5c01b9dee8f1752d758ff93c1fcfe54e5b6b15603ebc24765931b516caf29de4
font_01_sfnt_off00011cd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD4 9952 bytes
SHA-256: 87ce98a282872a6adcc8b3c77768bd4f429043e0b26e8c9e6e3f57fc0b29ed15
font_02_sfnt_off000132f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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