Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbad195ddf554e89…

MALICIOUS

PDF

76.9 KB Created: 2021-03-08 02:02:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 75b37760f644a116187fd55c85e1d6dd SHA-1: 9f0b30ced3e0f725eddd0b48d923711afa3d1e0c SHA-256: fbad195ddf554e8975b5c8c79683b0e0df522a9bb04d3583ab2fc43c0c12be18
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a fake browser/software-install lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://fokemale.ru/wix?keyword=rwby+roman+and+neo PDF link annotation
    • http://tipofeliluget.medianewsonline.com/zasaxepekiviwigogut.pdfIn PDF document text
    • https://cdn.sqhk.co/jozojijejip/FYIjjKE/70619026014.pdfIn PDF document text
    • http://tivuximuliku.mygamesonline.org/will_before_we_were_yours_be_a_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/arl0hew/6091751829.pdfIn PDF document text
    • https://cdn.sqhk.co/gepabafi/fWgfzvJ/73120224173.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_efd2f41274df4dd48279bb78ec9b6214.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/617d5472-a550-4e6c-b9d4-8dad6589c0c8/5th_grade_area_and_perimeter_word_problems_worksheets.pdfIn PDF document text
    • https://0296ecfc-28ae-4fa5-925c-67a25994cace.filesusr.com/ugd/c88839_1f649ab9be314c51a3b6ca71b6f40854.pdf?index=trueIn PDF document text
    • https://c245485c-e1a4-4c5a-9a2a-c465a95e53c8.filesusr.com/ugd/25f824_a8bc76ceb3d5434297c6cac69e314a2c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pisedij/what_percentage_do_thirty_one_consultants_make.pdfIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_414e3a8736824248b046d395cd3aff9f.pdf?index=trueIn PDF document text
    • https://d21da297-2d1c-4020-882f-059d99c29dc9.filesusr.com/ugd/3724a2_1160a17c82e74dc2bd4b27eb3c91fe9e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/cae_exam_sample_papers.pdfIn PDF document text
    • https://2a085669-a8dc-40eb-b1d3-71ea9d660f60.filesusr.com/ugd/cafc24_b7226c40bb664f4e93e1a7da44e68d9a.pdf?index=trueIn PDF document text
    • http://saxarivoje.onlinewebshop.net/how_to_make_a_flamethrower_in_minecraft_command_block.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/906dd181-8055-4f41-8774-874c66c64eb7/47517032742.pdfIn PDF document text
    • https://e809654a-a95b-4dbc-a338-24085255a2f8.filesusr.com/ugd/1b6cec_d2597e4da8b64f799b4e5052e54f9126.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mejifavo/15560167393.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FC 5100 bytes
SHA-256: a89e3212d754af1f059d425c5aca2f7166bc989a7661494509454bf95792f656
font_01_sfnt_off00010352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10352 10392 bytes
SHA-256: 510728c614ad3f5ab3bd00cab16a6b5d6c3d45274171e01b6ff9663d2d23e69e