Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1e06600bf5900cc…

MALICIOUS

PDF

88.0 KB Created: 2021-07-14 00:31:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0540c84445ade5bb35a3a37928822c98 SHA-1: bb4329e444385a0e1326e2edc30c7fba88bd97fe SHA-256: f1e06600bf5900cc1eae82f870f5686ebb276112eea31f9a09d77a0572afbd8b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to various websites, many of which appear to be compromised or disposable hosting. The presence of external URIs and link farm heuristics suggests an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 https://pixomot.ru/uplcv?utm_term=oceans+world+crossword+puzzle+answers PDF link annotation
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/g8u6r0jokedqnhd414kvg95kfq/33398459356.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/17364769226095302015eac.pdfIn PDF document text
    • https://tootooair.com/FileData/ckfinder/files/20210607_D381EAC34695E716.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/dupaxapajenalujim.pdfIn PDF document text
    • http://africareview.in/userfiles/file/31504204235.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/29942449889.pdfIn PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/60273731905.pdfIn PDF document text
    • https://fentesmakina.com/paket/upload/files/14357680636.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/fqo7d16n6ukqo81j2bd5hcfeh5/94832384416.pdfIn PDF document text
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/af76a73e29e01b21ebfe80581e80ac83/90363838779.pdfIn PDF document text
    • http://angeladaniel.eu/uploads/files/sovelex.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/2223ea2ba3d5f8d342c3cbee3497bbef/loluxuto.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf6fad9dd52---gavexuzolev.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609273aba1d74---rivilabovimavik.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/8f0617cbe353c647db4ceb77f28bae9d/zapilir.pdfIn PDF document text
    • http://joy05.com/_UploadFile/Images/file/kovas.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1609df7084db6f---bidipabibewunomagowutinar.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/20859460604.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/13e4b0f614c2a272d2751d4bb72711af/tolelimip.pdfIn PDF document text
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/jusomuzewirifelimago.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160741dd6e06ce---wujibudagebatogigadujeb.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087475046585---39203008139.pdfIn PDF document text
    • http://b-solutions.net/userfiles/file/wabugivepisuta.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/638f726a1deeba6c0352801491af4df5/gutijemani.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a82e305af8---25819392115.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/8da643a3fbd1682e98c3434ca38adfba/60137853477.pdfIn PDF document text
    • 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_off0000f4f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F8 10588 bytes
SHA-256: 5aff9704109ecdd1152c0233dd41d7de05d5b82eaa71c6f3c7c33d76af161675
font_01_sfnt_off00010d5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5E 17236 bytes
SHA-256: e2e19887fb63f40e20794b0bca524899b3662506bfc6ff421d0fe731a6cc4470
font_02_sfnt_off00013a5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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