Malicious PDF — malware analysis report

Static analysis result for SHA-256 2078a60d6a9f3a99…

MALICIOUS

PDF

81.1 KB Created: 2021-02-14 11:59:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0eaa7e830d35c40f3cea20f8057e5663 SHA-1: 3043bec8646d9de5ca2a55526b7e8b9dcf29f30e SHA-256: 2078a60d6a9f3a9922274b614ed81d2f3930bdb9fa18f5572eb65ab66b0cbfc0
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, flagged as a 'PDF_SEO_LINK_FARM'. This suggests a malicious intent to redirect users to potentially harmful websites, possibly for phishing or malware distribution. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were directly extracted, the presence of numerous external links indicates a likely attempt to leverage web content for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://jacksth.ru/123?utm_term=stoneham+high+school PDF link annotation
    • https://cdn.sqhk.co/guzikiku/FnQiitJ/doom_2_master_levels_download.pdfIn PDF document text
    • https://laxebuwefe.weebly.com/uploads/1/3/0/7/130775048/3622717.pdfIn PDF document text
    • https://komamizidunip.weebly.com/uploads/1/3/1/4/131437982/bigesesaf-vubijometufa-livepexes-kejexuwonine.pdfIn PDF document text
    • https://fabebebu.weebly.com/uploads/1/3/2/7/132740756/cfe43e10.pdfIn PDF document text
    • http://bufo.online/how_do_you_repair_a_broken_tubahyycg.pdfIn PDF document text
    • http://anbieterbewertung-autoscoutch.com/abrao_de_pai_joo_emshlfo.pdfIn PDF document text
    • http://bbbbbbbbeeee.space/42177907557m3ztc.pdfIn PDF document text
    • http://helps-lnstagramcopyrights-about.com/chhota_bheem_wala_game_karna_haic71q7.pdfIn PDF document text
    • https://xerazagas.weebly.com/uploads/1/3/0/8/130813913/kumezijumafileme.pdfIn PDF document text
    • https://dudulisatosix.weebly.com/uploads/1/3/1/6/131637211/zufula.pdfIn PDF document text
    • https://bavopasivivewid.weebly.com/uploads/1/3/0/7/130738836/cf3e927.pdfIn PDF document text
    • http://carbags.site/42366594630cwap6.pdfIn PDF document text
    • https://bokirises.weebly.com/uploads/1/3/1/6/131607331/3e1ecf66e.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/gajabedafot/femoxutikabejozej.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/demographic_information_in_research.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/economic_systems_guided_reading_activity_2-_1.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/34465808776.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/30097155138.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/meal_planner_and_shopping_list_template.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_off000100e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E5 5220 bytes
SHA-256: 8b5ccca8890f123aab9143acaf83269517e186199071748f8f62d657827321a3
font_01_sfnt_off00011285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11285 10812 bytes
SHA-256: 5090e2b2a866ce79ead3d43e3e59284613b619348d8ed019089df91c7ee8ee92

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