Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3ad485c11440755…

MALICIOUS

PDF

76.4 KB Created: 2021-04-03 17:19:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f1b4269d47375abe6376bf0b8d43acb5 SHA-1: 23374716d224f605f62bcfbae8a67621a783a2ec SHA-256: e3ad485c11440755a3210914d1740d8d2baa95517047be3bd1a3d8ece6a12050
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to distribute malicious content or conduct phishing. The primary malicious URL identified is https://midufefew.ru/wix?keyword=old+man+down+the+road+bass+tab, which is likely used to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://midufefew.ru/wix?keyword=old+man+down+the+road+bass+tab PDF link annotation
    • http://vasetar.iblogger.org/red_rising_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://05e27880-d5e1-4d3d-8428-ba943e9300bc.filesusr.com/ugd/b56239_7325577f57df4a958d0147fd1b2935ba.pdf?index=trueIn PDF document text
    • https://6c71f620-b6e5-46cc-9e58-526c5f0a7a41.filesusr.com/ugd/1c90dc_63e61c935efe4417b1a7a575cb316479.pdf?index=trueIn PDF document text
    • https://efa91360-7c21-416c-9d60-3189e0beb381.filesusr.com/ugd/42ffc7_89f5a36dc9b747acaf85e8eae766ac2d.pdf?index=trueIn PDF document text
    • http://mebufid.rf.gd/how_to_program_bmw_garage_opener_without_remote.pdfIn PDF document text
    • http://dosibaguluf.epizy.com/mipogugujatijodamagapoba.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/40003088217.pdfIn PDF document text
    • http://wawefib.rf.gd/html5_cheat_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a05142f-5ccc-4b47-82fa-218d69d448fa/85806743275.pdfIn PDF document text
    • https://0f0532cb-4478-41f9-91a1-cf277c4732ec.filesusr.com/ugd/8acad3_e8138704e0ca42b680eb2050cebdec6c.pdf?index=trueIn PDF document text
    • http://gojemivul.epizy.com/rimesudasexideledom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/815d67bc-8a2a-4188-b4dc-d45491c4ed7f/what_are_cycles_in_a_washing_machine.pdfIn PDF document text
    • http://botusijafen.rf.gd/2018_tamil_horror_movies_hd.pdfIn PDF document text
    • https://9e1e9198-0fe7-4103-8084-fdcc6befb8d5.filesusr.com/ugd/2f7815_16d67c94e54f4720a9652a72847f220d.pdf?index=trueIn PDF document text
    • https://e510c2d5-567e-4a96-89ff-abc18316baf7.filesusr.com/ugd/8a9bcc_36c834d4406143958c7d9524faa153ec.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/senodiw/riwabadivaj.pdfIn PDF document text
    • https://36071b1a-d853-4ad1-bccf-0ed894d94038.filesusr.com/ugd/906e9f_9d65486a5f354f7984498e48c6b83f60.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5424994a-0e6f-44f7-9937-b598ab9149f3/53234174818.pdfIn PDF document text
    • https://9f349447-249b-4747-956a-316fe86e371b.filesusr.com/ugd/d2b720_f47a1f500b5e4fc0a42084eeeefadc0b.pdf?index=trueIn PDF document text
    • https://6648aa49-deb3-4d6f-81a8-a63cc7a297fb.filesusr.com/ugd/38eac1_b710b45a77804b3aae62f67dbfce21dd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/27e8033a-26e9-42f3-b475-d3345740cb2e/84974668786.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/fafaxere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94e9991b-ec7c-4296-84cd-8e5edf0e50e5/kunevugededivowuludesuxiz.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_off0000ed3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3E 5324 bytes
SHA-256: 624c4fff00a948e8ff68495a813d3200fb1a03779387c59ac9931d318d0ed23b
font_01_sfnt_off0000ff2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2E 10848 bytes
SHA-256: 732b715c4e73ba80b0dc9003906c713e3db286dd9aa660a1fd39fb688f2d5967

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