Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba735511995c51a0…

MALICIOUS

PDF

75.1 KB Created: 2021-03-18 23:13:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: bed6e4ef555676775e96d5146284a181 SHA-1: 50a5bb0c6326f57a2dd81d36bc4bd954e7f5f91e SHA-256: ba735511995c51a072d64423046fb3d538030cf617114a89ad44b70b89294720
74 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. It uses an urgency-based 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 0.9999

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://dugedepap.ru/wix?keyword=red+flag+warning+washington PDF link annotation
    • http://matteset-spon.space/dejagubifebidudysolx.pdfIn PDF document text
    • http://folugomobok.getenjoyment.net/dugexuzara.pdfIn PDF document text
    • http://xigosilefonaboj.iblogger.org/64910794549.pdfIn PDF document text
    • http://im-marceting.site/gotranscript_test_answers_latestr35jx.pdfIn PDF document text
    • http://heleogose.online/java_json_number_formatws4qv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470532/normal_5ff3c64cae578.pdfIn PDF document text
    • http://tepugorotewole.medianewsonline.com/catholic_mass_readings_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367650/normal_5fce99f5c3cd5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487903/normal_5ff614b6c7ad1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/324ec366-0e1a-4546-aa7a-c71ff0e8a0ef/wodofovovabojurugari.pdfIn PDF document text
    • http://kubuxakul.epizy.com/85841076677.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/67160453204.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/2742189919.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/belkin_n600_db_wireless_n_router_firmware_update.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88ce4c36-6248-4c2c-90cb-ec2afab65262/thomas_the_other_side_of_the_mountain_roblox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ad49c57-8469-40fe-806a-9308bad242d1/17085196469.pdfIn PDF document text
    • http://disoluje.myartsonline.com/dish_network_vip722k_dvr_manual.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE824 5268 bytes
SHA-256: 93dd0bf5a4f6b0ca14650969d3a07dbf84f2031d5188a16b9e6145a17af2c226
font_01_sfnt_off0000fa21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA21 10564 bytes
SHA-256: 502789bc48b23e1571e352dd984b284f8250b8e840c0b04495cb6afdd3b3391e

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