Malicious PDF — malware analysis report

Static analysis result for SHA-256 65a1a31961b533f2…

MALICIOUS

PDF

102.7 KB Created: 2021-03-31 14:00:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ce99da91285e421ce4538525d849116b SHA-1: a6a81d304f8c6ba457f009b054b6729d03ea49a0 SHA-256: 65a1a31961b533f2b562c5fa04f05e1cac8bac829394a1ec832c1769c962fdd4
66 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. 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 0.9997

Heuristics 4

  • 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://soxebez.ru/award?keyword=axial+flow+gas+turbine+pdf PDF link annotation
    • http://feyakast.online/which_one_is_worse_a_psychopath_or_sociopath1d03h.pdfIn PDF document text
    • http://3bki.ru/596637354245ogwb.pdfIn PDF document text
    • http://tuimag.ru/wavijegununapirotstf7p.pdfIn PDF document text
    • http://servicesforsupport.com/yamaha_rx-v373_release_date44uxw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393018/normal_5ff782d21bf4c.pdfIn PDF document text
    • http://9gusevshop.website/hp_wireless_printer_offline_windows_10jqe60.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460678/normal_5fccc1992f50c.pdfIn PDF document text
    • http://italy50wow.pro/android_7._0_reset_network_settingscj0xp.pdfIn PDF document text
    • http://formblckr1.xyz/how_to_apply_48_laws_of_powermyr7u.pdfIn PDF document text
    • http://wavikedinufefe.iblogger.org/best_direct_vent_gas_fireplace_stove.pdfIn PDF document text
    • http://bezufosaga.iblogger.org/how_much_does_a_product_manager_make_a_year.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://96a604d4-6f4e-42dc-90fb-b802e1cf4ed0.filesusr.com/ugd/6ef60c_6633144e8346497ebf6a7cf816aeddda.pdf?index=trueIn PDF document text
    • http://buxusemi.epizy.com/othello_act_2_scene_1_analysis_genius.pdfIn PDF document text
    • https://ab25a8b3-4d80-4d4b-93a1-c1347014fa7c.filesusr.com/ugd/8d0191_1057220bfa3d412b8af07b54e5e69c5e.pdf?index=trueIn PDF document text
    • https://a1f0096d-76f5-425c-b826-5ccbd312c1bc.filesusr.com/ugd/8f8c07_cab2332adf054960afd0759559134eb1.pdf?index=trueIn PDF document text
    • http://xolagetomijured.epizy.com/apache_http_server_2._4_tutorial.pdfIn PDF document text
    • http://rosipev.rf.gd/14456657825.pdfIn PDF document text
    • https://24b051fc-04af-4e2d-8b9e-4e75c06063ec.filesusr.com/ugd/1a488c_172451e01f5d46598e05293822598e6f.pdf?index=trueIn PDF document text
    • http://josatagosovux.rf.gd/13431159190.pdfIn PDF document text
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_f07d5c5d0be64c1f8c93338492e25c69.pdf?index=trueIn 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
    • 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_off00013b98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B98 5496 bytes
SHA-256: 68300c114e787134da9dfc222571ce428adf0fda7fc7cdc8a22bb3ccd3f8fd40
font_01_sfnt_off00014e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E71 12352 bytes
SHA-256: 527e3368be5e27afa6670113286c2756d7012cd67b931008b01f156ceb59f328
font_02_sfnt_off000178f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178F4 16036 bytes
SHA-256: 52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550

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