Malicious PDF — malware analysis report

Static analysis result for SHA-256 2297f016cbbc8309…

MALICIOUS

PDF

79.2 KB Created: 2021-03-28 10:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 22277b26a366f96d26ce9862bcc745db SHA-1: 50fd9b0c29b4454a7bc6caddfcae6155db399ca2 SHA-256: 2297f016cbbc830925f51ac081d6158926aa59a95fd6f45d5e11ee9a089644f3
186 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 0.9967

Heuristics 6

  • 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 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.
  • 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://dafemum.ru/wix?keyword=plus+gsm+mms+aktywacja PDF link annotation
    • https://gobodozi.weebly.com/uploads/1/3/1/3/131398455/fidapep-texogejovivodi-wuxopa-daduvovo.pdfIn PDF document text
    • https://cdn.sqhk.co/zaxuloxedu/gfLCgfs/64014084967.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/U95Vgeb/all_creatures_big_and_small_lacona_ny_address.pdfIn PDF document text
    • https://cdn.sqhk.co/dujagazatad/d4lidjj/best_realistic_driving_games_ios.pdfIn PDF document text
    • http://jabewes.medianewsonline.com/66696351854.pdfIn PDF document text
    • http://zuvatewovu.scienceontheweb.net/internal_and_external_whistleblowing.pdfIn PDF document text
    • http://bixekakazozerol.mywebcommunity.org/adobe_reader_for_windows_10_download_free.pdfIn PDF document text
    • https://cdn.sqhk.co/zolewiko/iRLidT3/kaxoriwexefidopodanevefi.pdfIn PDF document text
    • http://tulomodev.getenjoyment.net/8000231349.pdfIn PDF document text
    • https://cdn.sqhk.co/tadanopi/vYfgdh8/secret_codes_for_free_data_on_airtel_uganda.pdfIn PDF document text
    • http://berozabekep.sportsontheweb.net/lizupeposetorez.pdfIn PDF document text
    • http://tejidirexe.mywebcommunity.org/acoustic_guitar_songbook_free_download.pdfIn PDF document text
    • https://pigaxapi.weebly.com/uploads/1/3/2/8/132815084/kikidalevuzom-wunatividirinix-nuxibab-jekazuk.pdfIn PDF document text
    • https://cdn.sqhk.co/wajuletixex/alKjjhh/nfl_fantasy_football_team_defense_rankings.pdfIn PDF document text
    • http://xesapuwax.mywebcommunity.org/introduction_to_entrepreneurship_books.pdfIn PDF document text
    • https://cdn.sqhk.co/niririga/oUVHAD0/kufapizibotevukurudojirij.pdfIn PDF document text
    • https://nobaletakalesig.weebly.com/uploads/1/3/2/3/132302751/2133500.pdfIn PDF document text
    • https://cdn.sqhk.co/baresupujar/ibijzQ9/major_airport_near_atlantic_city_nj.pdfIn PDF document text
    • https://nekawamanijem.weebly.com/uploads/1/3/4/8/134877182/1496322.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d19688e0-347f-4d9d-8cb3-d47c6e049f3d.filesusr.com/ugd/c618e9_9781ee5e189c4c2eb4fd47345620193c.pdf?index=trueIn PDF document text
    • https://dedb376b-efc3-4528-ac10-fc65d12f866c.filesusr.com/ugd/5f6074_c3a2380ef8cc4be9a56dc841fee2388a.pdf?index=trueIn PDF document text
    • https://144ece88-722e-4d59-a9d1-ae16887514c2.filesusr.com/ugd/48b17f_160f0a5c713e4ff38f78025d411f42de.pdf?index=trueIn PDF document text
    • http://fovawipemezipu.myartsonline.com/61693537476.pdfIn PDF document text
    • https://6593eeda-10fe-4128-810f-cbbc79f0a4f8.filesusr.com/ugd/c0a4bf_fc0223c0a9d643c1927805141b060b32.pdf?index=trueIn PDF document text
    • https://84d51d8d-5932-465a-b044-5d36dace581c.filesusr.com/ugd/98e2de_1e989d8de0e64ee3852facc90efab879.pdf?index=trueIn PDF document text
    • http://mawidinivetobi.myartsonline.com/bulleh_shah_poetry_in_punjabi_free_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF469 5360 bytes
SHA-256: eebc5d5ca191d4c07921f13908df97290ed93cbe66e860a86c7d1660ef53d505
font_01_sfnt_off000106b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B3 12172 bytes
SHA-256: 45354e0dcabd0157931db211918b22b21ade643610d2eb049003788ae0141b4d