Malicious PDF — malware analysis report

Static analysis result for SHA-256 8da073b946f2c32b…

MALICIOUS

PDF

83.4 KB Created: 2021-08-20 17:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3a53021fa945c9516f1a8d0368fbfc14 SHA-1: 2052fc4be16c6848a10a932fd8d027e65c4beafc SHA-256: 8da073b946f2c32bf7defeb308eb8ad30768430289479d28d3a285b23b44738e
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. These links likely serve as a distribution point for phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • 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://195exim.com/datas/files/55023839176.pdf In PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0facc5568---bazok.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/evc7bfnndfeanmneil5th54mrb/lilurusage.pdfIn PDF document text
    • https://aquatrustfina.com/userfiles/file/46662994658.pdfIn PDF document text
    • http://thepducphat.com/upload/files/43294608192.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/supaxi.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/tekunokexotiduxuli.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/72424928171.pdfIn PDF document text
    • http://www.39koratmachinery.com/file_upload/files/42474776491.pdfIn PDF document text
    • http://rc-modeller.se/images/file///xemajugobuzisiv.pdfIn PDF document text
    • http://metallpress.info/files/17618718420.pdfIn PDF document text
    • http://jncs.kr/page_data/file/20210601193316.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f3871e41004---zepotoxigo.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/95800124965.pdfIn PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f1a744005---vimujabanurutalalufukutu.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160768376e3b38---56497084723.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/cd22ba3a3bc27b2224f0d875bee17c8f/60481498338.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/goruw.pdfIn PDF document text
    • http://goref.ru/files/file/62940340641.pdfIn PDF document text
    • https://mosaicopeoplecorporation.com/ckfinder/userfiles/files/81798119771.pdfIn PDF document text
    • http://dichvutot99.com/webroot/img/files/fejab.pdfIn PDF document text
    • http://universalestetic.com/userfiles/file/vonazozodixebem.pdfIn PDF document text
    • http://chukgoobok.com/files/fckeditor/file/zeninunopopupimeze.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/2e0d19bb2b819ecd41f48e0113855acf/83121297601.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=jesus+song+in+tamil+mp3+free+downloadPDF 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_off0000e0a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A1 16720 bytes
SHA-256: 4eeb6961d0fc62393cf6de6c0369311efb8bdaf643a6af36130efa50f1bebac2
font_01_sfnt_off00010c3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3D 11192 bytes
SHA-256: 5946f0016b996fdf07cb307868f7f287f2fb5c3fc43c9139fcadf16bb57c7c59
font_02_sfnt_off00012651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12651 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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