Malicious PDF — malware analysis report

Static analysis result for SHA-256 38839cf6ea964536…

MALICIOUS

PDF

69.8 KB Created: 2021-03-24 18:33:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 11910a079986e708f12dd55bebb97155 SHA-1: c05ca87885f01edb7c6454a0ea1e83a2ab93fe65 SHA-256: 38839cf6ea964536357d947e3b74bac82188f6a6d4a713749e9b9897e6c196d8
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/wix?keyword=evergreen+forest+apartments'. This indicates the document is designed to lead users to a potentially malicious website. The ML classifier and ClamAV detection further support its malicious nature, classifying it as phishing malware. No scripts were extracted, but the presence of malicious URLs strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://crophysi.ru/wix?keyword=evergreen+forest+apartments In PDF document text
    • http://fisujerekuvij.getenjoyment.net/cambridge_english_complete_advanced_student_s_book.pdfIn PDF document text
    • http://ganoget.scienceontheweb.net/buvaburepanedomakexugu.pdfIn PDF document text
    • http://omoikiri.info/296572561682jh3h.pdfIn PDF document text
    • http://suwetobolubujub.getenjoyment.net/numerical_reasoning_aptitude_test_questions_and_answers.pdfIn PDF document text
    • http://circulyarkadigital.xyz/20923386277vi585.pdfIn PDF document text
    • http://reduslimitalia-official.website/turajeluxumuu4ozh.pdfIn PDF document text
    • http://birebap.scienceontheweb.net/keto_meal_prep_recipes.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/makixibawumebol/99592932172.pdfIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/38289358310.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/99677569404.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/zuvip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c3114ef-293a-4864-96c3-ba6dc241e5b7/27383984350.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f78c3b3c-62a0-4e27-8d32-c5c9ad90085d/sims_3_sunset_valley_fishing_spots.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/descargar_movie_maker_para_windows_10_gratis_softonic.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/jaramenavinifusu.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/cashew_chicken_sheet_pan_dinner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4004ef34-273c-4fe5-ab3f-e9d9223d7d6a/vexatatob.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/vasovagal_syncope_patient_information.pdfIn PDF document text
    • http://lugivodunoxasi.atwebpages.com/top_30_engineering_colleges_in_hyderabad_2020_download.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_off0000c7ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7AE 4944 bytes
SHA-256: c484d1e0f452a7126bfbb86142c9f44a774a53b34d05c520f93ba85d4abd3340
font_01_sfnt_off0000d869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD869 10536 bytes
SHA-256: 010922e93ed07669adbb5f1dab9a2a68e224e6bfd39036376d5b777c326bf888
font_02_sfnt_off0000fc22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC22 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2