Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd3b04929845e104…

MALICIOUS

PDF

76.2 KB Created: 2021-03-30 20:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f189cffcf8d0055305d0cbb5b688e07f SHA-1: bf8e9143775e29c0b348358000492a8b8e1333fe SHA-256: dd3b04929845e104dc1e80c4b7eada4fd5678b216489e91530005ca15ec1c035
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and a heuristic flagged it as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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 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://cdn.sqhk.co/patagarinixa/dibjdgj/60901751511.pdf In PDF document text
    • http://butojaxutaj.22web.org/wild_animals_coloring_book.pdfIn PDF document text
    • https://cdn.sqhk.co/mugodetutag/8wQCjiw/90302625207.pdfIn PDF document text
    • https://cdn.sqhk.co/loxexafetivu/h1iLjaM/walmart_black_friday_tv_deals_50_inch.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/razvivatel/yapz/~3/gOBB6uaVNRA/square?utm_term=open+source+intelligence+techniques+michael+bazzell+pdfPDF link annotation
    • https://s3.amazonaws.com/desekusoxi/bubble_blast_2_game.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/takapobubinon.pdfIn PDF document text
    • http://dufatiji.rf.gd/69600298420.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/written_off_status_in_cibil_report.pdfIn PDF document text
    • https://98771922-91e4-4673-aa0d-7794f4435593.filesusr.com/ugd/b6aaa0_7315e723fb4745e2b9b3a369f9f6728d.pdf?index=trueIn PDF document text
    • https://92ddf5cc-4ce7-4caf-b117-8241c553a727.filesusr.com/ugd/42bae0_a7a8a536600b4cd6a2ab5dc9ea5b18fb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/uppababy_vista_2020_release_date_uk.pdfIn PDF document text
    • https://6f4861c6-cdf0-4a5f-ba2d-f9c5e5bfbee6.filesusr.com/ugd/77941b_a2c649f2bf2a4fc595cf78e6d1034469.pdf?index=trueIn PDF document text
    • http://dunedobaxapekir.epizy.com/is_warm_bodies_based_on_a_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ad797a7-ff29-44ca-87fb-49f5dd3fe2e7/decision_tree_regressor_sklearn_example.pdfIn PDF document text
    • http://puzasapexuwuju.epizy.com/windows_media_player_sound_booster_free.pdfIn PDF document text
    • http://zovulebipa.epizy.com/lixirodaxixezutuvo.pdfIn PDF document text
    • https://200c4c3d-185b-4246-b99f-f40cd7065c99.filesusr.com/ugd/3ed902_48d6b7a65b9e4ee6b991000abed16c49.pdf?index=trueIn PDF document text
    • https://9e2b3e3a-6a02-4d3b-8ba9-5acc01041672.filesusr.com/ugd/66c878_32912386bc8a42fa97d3f627b0c45958.pdf?index=trueIn PDF document text
    • http://wokakegefu.rf.gd/forms_module_import_angular_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c788985f-a407-4015-b578-e765cf31a09d/16901704041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f995b39-14d4-44b7-b2b8-7de28e37e34f/wabanamogikelasizafaw.pdfIn PDF document text
    • http://tirevotijo.epizy.com/exit_interview_form_malaysia.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_off0000e8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B4 5912 bytes
SHA-256: 4dfa86a26201949092909cc62e3042973fce75fef53c8a880705da0606f47d38
font_01_sfnt_off0000fc9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9C 11140 bytes
SHA-256: c099d711e2ae15a9237e49cf520d1652e6bc026c9b05b1bb1b8c1646395677d7

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