Malicious PDF — malware analysis report

Static analysis result for SHA-256 8553e4428fd87482…

MALICIOUS

PDF

79.7 KB Created: 2021-03-09 10:50:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c7ba2f01b9d816627d5c524b77b8e5a3 SHA-1: 61aa958722e8248a5744d10e0735d058814e2f7c SHA-256: 8553e4428fd874827601ef362d34d1c578c00dc3d9687f12a80be02cfb8a2782
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and 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 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 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.
  • 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://vilenefex.ru/aws?utm_term=why+is+my+garbage+disposal+not+running PDF link annotation
    • http://befotuke.mywebcommunity.org/49322416965.pdfIn PDF document text
    • https://cdn.sqhk.co/zebenane/hjm78Ke/97793189854.pdfIn PDF document text
    • https://cdn.sqhk.co/wosepimi/6jfA4gg/fantasy_football_2020_coronavirus.pdfIn PDF document text
    • https://cdn.sqhk.co/vetelojid/acWgghd/3d_snake_drawing_pencil.pdfIn PDF document text
    • http://mopexaxurip.getenjoyment.net/63880494027.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a2214900-82f6-4ed5-a432-d5ffd14110fa.filesusr.com/ugd/306b6b_3f736172dd28460ea2e75bb70ca6e85f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sevoga/droid4x_emulator_for_windows_7.pdfIn PDF document text
    • http://wafidifu.rf.gd/certified_exercise_physiologist_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/why_microwave_does_not_heat.pdfIn PDF document text
    • https://f8340159-69ce-4309-ac43-521e9a8475b4.filesusr.com/ugd/bc0b97_bab80cae5f254200a81433f666c99662.pdf?index=trueIn PDF document text
    • http://xubudexev.epizy.com/922842359.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/jofiwakowawenevedo.pdfIn PDF document text
    • https://d525ee04-2a40-494f-8ba9-fee52f7b18ee.filesusr.com/ugd/8b8e24_82a5daa3d5c941f9ad798655b02920d9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wekibik/s_p_global_1200_information_technology_etf.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/bsc_chemistry_practical_note_book.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/citizen_gents_eco-drive_titanium_wr100_titanium_chronograph_watch.pdfIn PDF document text
    • https://7ef5d8b8-74ac-4e0a-b0a0-fa61ca6462a8.filesusr.com/ugd/23e9be_124911e1fa2f4e90a4a254edf833c326.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gazivemon/keithley_dmm_2000_datasheet.pdfIn PDF document text
    • https://23708fd6-ed06-4ee3-a58a-1e151ad0b038.filesusr.com/ugd/b3bc21_fe8cb4efd9d54661b0ea35b44b9e3b87.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/plural_and_singular_form_of_alumnus.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/50895860506.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_off0000fad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD4 5628 bytes
SHA-256: fcd1a49c54a57d5d0e0fb3d3859422a16fb9b686398ec8dfdfdb8b99b38dff0a
font_01_sfnt_off00010dd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD6 10376 bytes
SHA-256: 29b8fcae6c72d9fcf52ab88499f72cebc56bdadaa838a143dd79eaa1447edb01

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