Malicious PDF — malware analysis report

Static analysis result for SHA-256 5209a0deba9844ef…

MALICIOUS

PDF

82.2 KB Created: 2021-03-18 22:10:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 3acbaebde2d0111dc30afd19477575c9 SHA-1: fa0f2c017435678938dbda06b7fd6b2131606ed2 SHA-256: 5209a0deba9844ef76fcd2e353fb58390f399f365a3fde4b9e14d885ccc2067f
134 Risk Score

Malware Insights

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

The PDF contains multiple external URIs and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware delivery. No scripts were extracted, but the presence of numerous suspicious URLs points to a download or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mezovuduw.ru/award?keyword=cementoblastoma+pdf+2020 PDF link annotation
    • http://rokuboxajiga.medianewsonline.com/active_and_passive_voice_exercise_with_answers.pdfIn PDF document text
    • http://watomidipokaki.22web.org/vejexafuwojaf.pdfIn PDF document text
    • http://juwaniwabi.medianewsonline.com/vakenakalakosuguzorabexat.pdfIn PDF document text
    • http://xipelosowux.22web.org/new_bengali_movie_in_720p.pdfIn PDF document text
    • http://trend-sales.fun/pneumonia_treatment_guideline_idsabeyyy.pdfIn PDF document text
    • https://cdn.sqhk.co/vomifavafo/je2YErC/a_s_r_form.pdfIn PDF document text
    • https://cdn.sqhk.co/rawerusiwala/hipjhEN/fivopipokevufenem.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/fja54el/vipevolepudinifepew.pdfIn PDF document text
    • http://vizit.store/ritunalijafepuzela06ovm.pdfIn PDF document text
    • http://jobs-ingenieur.best/jetojolarolozolovizes8mhs0.pdfIn PDF document text
    • http://toxipoxekej.medianewsonline.com/cabelas_commercial_meat_grinder_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/xorilulog/OHiMXja/81415255486.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://30b7a97f-6117-4fff-8876-4b3c2220b6c6.filesusr.com/ugd/15cd4d_c417a860a32a4f7da9a4ea20d801e693.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pomaxa/does_fuel_oil_smell.pdfIn PDF document text
    • http://rixigor.onlinewebshop.net/87862506693.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/lovujo.pdfIn PDF document text
    • https://9cf93ecd-64ee-4ad6-afcc-f350577a7522.filesusr.com/ugd/c4dbd3_eb5d6cf9173043ccaec1194f31e1329c.pdf?index=trueIn PDF document text
    • http://jenamer.rf.gd/bajaj_boxer_spare_parts_price_list.pdfIn PDF document text
    • http://keguwaburafokul.epizy.com/6085195399.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/8_ball_pool_game_karna_hai.pdfIn PDF document text
    • http://xapimiwosusuv.epizy.com/briggs_17.5_compression_release.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
    • 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_off0000ee21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE21 5408 bytes
SHA-256: 921ff3f165455c0ad5b6ed857b296a53c9be2af18106d597bbff7ea79c494762
font_01_sfnt_off0001006b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006B 11244 bytes
SHA-256: bdc2539860d16c4623838c93e5a911a8b86940df81446ab946a280a124540343
font_02_sfnt_off000126ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126BA 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90

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