Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aea6c877c7bc1c4…

MALICIOUS

PDF

108.8 KB Created: 2021-03-29 05:27:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f9bc6853bb43d3c71af441127c6a5726 SHA-1: 4cfcac7575a99c77378148af3c1a2f0896dbefe6 SHA-256: 0aea6c877c7bc1c4a6b68a36a8acd6ec3ebc81474a8d29deb423dbd97b19f22b
182 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain keywords related to the embedded URLs, suggesting a phishing or malware distribution attempt. The presence of ClamAV detection and ML classification further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9548

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=biogas+definition+pdf In PDF document text
    • http://biomanua.website/kindle_paperwhite_users_guide_2nd_editionzdfdj.pdfIn PDF document text
    • http://cardioactiveuficiale.site/how_to_use_rid_x_in_kitchen_sink7xaqw.pdfIn PDF document text
    • https://cdn.sqhk.co/vonofuguniti/jeSxjfe/69203587449.pdfIn PDF document text
    • http://powerpoint4you.ru/nazijujo9exc.pdfIn PDF document text
    • http://goo-y.xyz/88077703299i0g2f.pdfIn PDF document text
    • http://chelamela.org/balancing_chemical_equations_worksheet_1_answer_key_1-2032r3p.pdfIn PDF document text
    • http://floradoma.net/89581240394mlnyo.pdfIn PDF document text
    • https://cdn.sqhk.co/nikofejujel/cGHhchc/warren_buffett_age_and_net_worth.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://cdn.sqhk.co/kikolibub/LjijbXm/earth_wind_and_fire_greatest_hits_vinyl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3d636ecf-b5c4-4691-845c-2d501a7a8090.filesusr.com/ugd/b09df1_e2ce67fcf1e1413ba4a1ed3b38b8bbc1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a01f4438-bd7a-4ee3-ac53-13183cb04c49/kenmore_electric_range_element_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbe5c81b-35c6-4410-9223-c2220ed786ef/lezijabegebutokupikesedar.pdfIn PDF document text
    • https://f1ddcea9-c323-452c-a4d3-aaefec61e50a.filesusr.com/ugd/defd8a_e75db945c1e14091a895098e5e2b9682.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9497c176-8786-494b-a936-cfb276bf25fe/jolamujukip.pdfIn PDF document text
    • https://9334512a-4df1-45dc-8804-f0fa1d9e2a3d.filesusr.com/ugd/9466eb_372c26695b8d42f5b9f440b1042afb0d.pdf?index=trueIn PDF document text
    • https://af6bd0e1-9fb2-4c52-b6e5-df6188d17e94.filesusr.com/ugd/771d18_e4b3cbb58b6b4e9b84c0ead27b81d9e3.pdf?index=trueIn PDF document text
    • https://41fe7446-7195-45c8-906d-de5e784989f9.filesusr.com/ugd/e02969_0c5248d6b99e4da2a2c1b71dcfef2094.pdf?index=trueIn PDF document text
    • https://eb40363d-1d1f-4170-a897-f23f0f433116.filesusr.com/ugd/2a1429_be2e39b549af4baca20eca6de31ca46e.pdf?index=trueIn PDF document text
    • https://e0d0d77b-4c00-4265-bc22-f0cc5cf11ada.filesusr.com/ugd/957eb4_0fbeea92cd894511b8bac4ee12df2766.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001941e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1941E 5132 bytes
SHA-256: 07fc7c63a76f8254134a1269a4f846394a0f012af458df8e052517011648dea4

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