Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed87e9a7dc9ba1fb…

MALICIOUS

PDF

72.6 KB Created: 2021-03-23 16:13:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 9d812ca09e3c6dd393431f60c939b0c4 SHA-1: 0e7ff2271764fac1236edf51afeb2ff9ea50ac6e SHA-256: ed87e9a7dc9ba1fbe09f2a2c458e375ab5dd899781ae6c0303e5d364c3b1f6ab
66 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates the document is designed to host many links on disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://botokaw.ru/award?keyword=deficiencia+biotinidasa+pdf PDF link annotation
    • https://cdn.sqhk.co/toxaxiked/Czgj5gf/detivix.pdfIn PDF document text
    • https://cdn.sqhk.co/dodamewope/jfemjjJ/developer_options_android_s7.pdfIn PDF document text
    • https://cdn.sqhk.co/pulisamog/jXx7f0e/ancel_ad310_update.pdfIn PDF document text
    • https://cdn.sqhk.co/jupozaregu/njjFvZW/fobakesapevakosomigujitis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401973/normal_5fecca4412dcd.pdfIn PDF document text
    • https://cdn.sqhk.co/dinigivo/miieTbR/mutant_enderman_mod_1._12._2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379379/normal_5fe3ac3c12b49.pdfIn PDF document text
    • https://cdn.sqhk.co/tatonabufule/oVXOhhA/watchlist_retro_arcade_games.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502563/normal_5ffc1f1c4e959.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450428/normal_6001d6c249b86.pdfIn PDF document text
    • http://bakelenodizaro.iblogger.org/wordpress_contact_form_7_css_template.pdfIn PDF document text
    • http://disadijemedox.22web.org/how_to_apply_splat_washable_hair_dye.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451970/normal_5fe51a1de8c47.pdfIn PDF document text
    • http://sivupagelif.iblogger.org/vixilijijebinekimekugiz.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
    • https://s3.amazonaws.com/bakoloj/best_answers_to_interview_questions_conflict.pdfIn PDF document text
    • http://bibirosomuxir.epizy.com/10465601124.pdfIn PDF document text
    • http://rekitajutori.rf.gd/astm_b117-_11.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/2222928484.pdfIn PDF document text
    • http://dakatowase.epizy.com/rogozutisab.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/basic_computer_hardware_repair.pdfIn PDF document text
    • http://verovaweroxuxu.epizy.com/herman_miller_aeron_chair_replacement_casters.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF72 4948 bytes
SHA-256: 9b3663e81d93ebcde3c7424f58430adc7b54ba88c5858ac6323192409f9a7f03
font_01_sfnt_off0000e048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE048 11140 bytes
SHA-256: 610b5b18a5a22bc4a9f4b078c10f7426d5a49944281f434df959f3f9a56a02d6
font_02_sfnt_off000104ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FF 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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