Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea9cad039a767759…

MALICIOUS

PDF

79.3 KB Created: 2021-03-23 19:58:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3a3cf5d93f8afc7ad9bc96704a25c039 SHA-1: dcb0de56a7d91d620b1346c8478f95ccb5f07ea5 SHA-256: ea9cad039a767759bf730ba50c92cdf63ecf8544af4b5bfe88550199ce5aa3e3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

Heuristics 5

  • 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 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://seumenha.ru/123?utm_term=cariloha+classic+bamboo+sheets PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454041/normal_602b82e347246.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386828/normal_600414ce53086.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476577/normal_5fd634745a7e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475853/normal_601eaa06ccd31.pdfIn PDF document text
    • http://ripugusulufiluj.getenjoyment.net/prozac_nation_book_download.pdfIn PDF document text
    • http://lemakomude.sportsontheweb.net/bcps_calendar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wovugi/how_to_change_2011_chevy_equinox_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/70588641686.pdfIn PDF document text
    • http://roxeruteruda.epizy.com/exercise_guidelines_for_high_blood_pressure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c4409bc-b1f0-416e-b9be-73c55470eb1a/60273736170.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7290686-3594-459f-9775-def3c9ce5464/frigidaire_high_humidity_50_pint_capacity_dehumidifier_ffad5033w1.pdfIn PDF document text
    • http://fawivemepogu.epizy.com/java_swing_viewer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d93b929-573d-4b82-873f-3540ccb85bc3/what_is_error_79_on_hp_printer.pdfIn PDF document text
    • http://fofifalog.rf.gd/88885598190.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/27045880398.pdfIn PDF document text
    • http://lobexot.epizy.com/37740452067.pdfIn PDF document text
    • http://rawigukegopafot.onlinewebshop.net/bridges_math_kindergarten.pdfIn PDF document text
    • http://doriponesarom.myartsonline.com/ecocardiografia_transtoracica.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/focusrite_scarlett_2i2_drivers_free_download_windows_10.pdfIn PDF document text
    • http://lozuzotatuvibow.rf.gd/jumpers_knee_surgery.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADE 4884 bytes
SHA-256: ebec641fdb8a2c1c7b683cc48c59dbf75279916dc1807b872b820d17f55c1864
font_01_sfnt_off0000fb73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB73 11268 bytes
SHA-256: dd0c39c7116c79c9b9d50288c9b23fedd2e53aec632ae854cb75fdd1d1711d55
font_02_sfnt_off000121c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C1 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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