Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f230d79370a272…

MALICIOUS

PDF

75.9 KB Created: 2021-06-06 00:11:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e6eb5be6541da9f83393e4b4235d1d15 SHA-1: 265259f75d32ea5e0a3729b22bd635c6442f8e57 SHA-256: 76f230d79370a2726a1260eb718860040b7a9e6469fe2d2270c834247485db1c
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious content. The embedded URL points to a domain associated with link farming and disposable hosting, suggesting a phishing or redirection attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://smidgel.ru/pbw?utm_term=sanyo+tv+codes+for+a+ge+universal+remote PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4485010/normal_60065a25e9167.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468530/normal_6039c79cc7b31.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379485/normal_600277edd6e5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501204/normal_60652be5b28cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384828/normal_60394722c2d17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377642/normal_5fd66b9e8a2be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459322/normal_602ab23cc434d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446382/normal_5fe4fc8882358.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448124/normal_5fd1363937142.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sisagexal.pbworks.com/f/what_is_edi_payments_from_amazon.pdfIn PDF document text
    • http://tufukamapaf.pbworks.com/w/file/fetch/144686199/3_phase_induction_motor_winding_calculation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81159fc8-9102-4a59-81ec-e3bde9013604/94753810575.pdfIn PDF document text
    • http://lojefizowoj.pbworks.com/f/98884772415.pdfIn PDF document text
    • http://bawamotijeku.pbworks.com/f/luka_chuppi_song_photo_download_mp3_bestwap.pdfIn PDF document text
    • http://zabodovojif.pbworks.com/f/biblia_cronologica_reina_valera_1960_gratis.pdfIn PDF document text
    • http://nerobedevu.pbworks.com/w/file/fetch/144447234/price_of_toyota_revo_2018_in_pakistan.pdfIn PDF document text
    • http://banusiv.pbworks.com/f/singular_possessive_apostrophe_worksheet_ks1.pdfIn PDF document text
    • http://gezebal.pbworks.com/f/nulls_royale_apk_download_ios.pdfIn PDF document text
    • http://jolunatimavu.pbworks.com/f/76675027270.pdfIn PDF document text
    • http://buwutel.pbworks.com/f/52331116058.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d51d8b1-e49d-43d3-8674-79f400a1dec5/8372818803.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cb086e2-4d90-4381-b9c7-bf5a0bcfea24/how_to_use_noco_genius_battery_charger.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAB 5604 bytes
SHA-256: 05dd4e15d14e4d4a06a628b72962bef118d12245af99c905728b60853f1e0d37
font_01_sfnt_off0000fdbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBF 10872 bytes
SHA-256: 4d4324e12925419469e1382e96d7e886f4fde01a9df15fb834eab330f94ea952

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