Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea6bb0e895d0f3a…

MALICIOUS

PDF

81.5 KB Created: 2021-02-22 19:23:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 816ddae0cc91af45127048aa740c7214 SHA-1: 1229aa07478063a266306e4976acb328e0cfbb6b SHA-256: aea6bb0e895d0f3a4c1a645e71dfde8d9aaf7a5e23b02abd7f09d6fbbfd62a62
156 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 0.9996

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
  • 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://maypoin.ru/123?utm_term=descargar+libros+de+educacion+fisica+pdf+gratis PDF link annotation
    • https://cdn.sqhk.co/pezolaje/gwDgfd5/cheats_gta_v_ps3_motorbikes.pdfIn PDF document text
    • https://duditoza.weebly.com/uploads/1/3/2/3/132302736/dakawilebezikabowir.pdfIn PDF document text
    • https://vopesowe.weebly.com/uploads/1/3/4/6/134638419/jobakagekutulip.pdfIn PDF document text
    • https://jevezorubik.weebly.com/uploads/1/3/4/8/134864628/2933491.pdfIn PDF document text
    • https://cdn.sqhk.co/zupololano/uicgeMW/trend_hair_salon_loftus.pdfIn PDF document text
    • https://cdn.sqhk.co/vazodowadu/gepLvic/stick_cricket_2_3_stumps_requirements.pdfIn PDF document text
    • https://cdn.sqhk.co/kosojilufut/AuN6Xie/kuwait_flight_updates_news.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
    • http://lanotiwigizoxep.epizy.com/todivub.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/makkar_ielts_speaking_2019_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/4197743146.pdfIn PDF document text
    • http://dudolisimak.epizy.com/s_letter_song.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/60015101711.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/58955853808.pdfIn PDF document text
    • http://sorajapiliwixod.rf.gd/what_does_a_crm_coordinator_do.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/indonesian_embassy_pakistan_visa_form.pdfIn PDF document text
    • http://luzeparuzibez.rf.gd/electrochemistry_class_12_important_questions_and_answers.pdfIn PDF document text
    • http://tovasiken.rf.gd/harman_pellet_stove_vs_quadra_fire.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/23744453644.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF1 5344 bytes
SHA-256: e5c6effe29bfed314d81b6954e055503773e370e0c2071f16b3308e6dcd1c4da
font_01_sfnt_off0000e215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE215 2092 bytes
SHA-256: 9fcfd2b2c12c9d480c0beec3ee39f05b9e518edc5177a7a5fcc68dff0371f8a2
font_02_sfnt_off0000ebb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB6 12008 bytes
SHA-256: d31425ceca5c7608a9eff8fd0bc89bf2e64d09662847767b1130a14a13c5d7b1
font_03_sfnt_off000112c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C9 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
font_04_sfnt_off000127f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127F7 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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