Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2c1a8bb3f396fc4…

MALICIOUS

PDF

105.8 KB Created: 2021-02-12 01:40:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8818fd6564367411395e5f8caa2b66b8 SHA-1: ec6e6cc486f8366bbfcd15ccfe15cb06bbe5c9eb SHA-256: b2c1a8bb3f396fc416dc73e5b7797c4ab36897c2ef9e3d8a6a3181b1fccb0ffb
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are associated with link farms, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://crophysi.ru/123?utm_term=elite+dangerous+powerplay+guide+fr PDF link annotation
    • http://faceskinagainbeauty.xyz/hungry_shark_mod_unlimited_money_apk9pxgn.pdfIn PDF document text
    • http://milansit.space/top_boss_fights_video_gamese5jch.pdfIn PDF document text
    • https://gugibutuxu.weebly.com/uploads/1/3/2/8/132814167/xiwipivuzajitoj_fexapiduxuribe_folanazokid.pdfIn PDF document text
    • http://bajelow.iblogger.org/gubim.pdfIn PDF document text
    • https://buvawaxeve.weebly.com/uploads/1/3/0/8/130874113/f69add8becd.pdfIn PDF document text
    • http://medicinfo.online/prosperity_party_ethiopiadplxv.pdfIn PDF document text
    • http://loveantravel.xyz/xevipawazedafebufevikixegr9le2.pdfIn PDF document text
    • http://verenica.net/ipratropium_bromide_albuterol_daviswhnns.pdfIn PDF document text
    • http://meetsalle.xyz/2052179637f1bwy.pdfIn PDF document text
    • https://botoriki.weebly.com/uploads/1/3/2/6/132682976/f6f6d3f.pdfIn PDF document text
    • http://support-copyrighthelpservice-about.com/liwugexebotidunumejenemus5wknu.pdfIn PDF document text
    • http://curvepreloved.com/best_soccer_manager_games_onlinehpj9q.pdfIn PDF document text
    • http://probmake12.xyz/simple_and_compound_sentences_worksheet_grade_8msf04.pdfIn PDF document text
    • http://bcpzonasegurape2-viabcp.com/que_es_el_amoniacolr9z3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/jejoxivibipizizipademibov.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/world_history_textbook_answers_10th_grade.pdfIn PDF document text
    • http://bakenexiradofo.epizy.com/db_annual_report_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/bahubali_songs_free_doregama.pdfIn PDF document text
    • http://varaxekewuveza.epizy.com/ludox.pdfIn PDF document text
    • http://zutagisite.epizy.com/vigujewatupokanisumexik.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14315 5360 bytes
SHA-256: 4398ea3a2705b2c0f47c7b3e4958395e49b7f08a800676b9ba406b3752ab38ce
font_01_sfnt_off00015576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15576 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off00015e04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E04 10936 bytes
SHA-256: bf8f57152df46575de3d8b80e055ff09482b843fec9c887f8eff15d40a34429b
font_03_sfnt_off0001833f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1833F 16312 bytes
SHA-256: aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0

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