Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bb938ef3618e3ab…

MALICIOUS

PDF

172.0 KB Created: 2021-03-06 01:50:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9b100bf4b63347da43602aca91387462 SHA-1: f61984bf9ed3fc5fc41d4deb6151414d8814976f SHA-256: 0bb938ef3618e3ab13af1870bb34788cb90bdefdfe70bc2500a791cd27f01cd1
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous embedded URLs, with one prominent URL pointing to 'maypoin.ru', suggesting a lure to a malicious site. The document body, though partially corrupted, appears to be a deceptive title related to child education, likely intended to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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://maypoin.ru/123?utm_term=10+ways+to+help+your+child+succeed+in+elementary+school PDF link annotation
    • https://cdn.sqhk.co/miweguzeg/j2jdgig/life_is_strange_chloe_and_rachel_figures.pdfIn PDF document text
    • http://busumewum.22web.org/learn_hindi_in_30_days_through_tamil_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392457/normal_5fcb0f2fef1a0.pdfIn PDF document text
    • https://cdn.sqhk.co/naziwixolagu/XNhd0NP/chess_game_online_play_free_now_3d.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/Okgjd4r/national_civil_war_battlefields_in_virginia.pdfIn PDF document text
    • https://cdn.sqhk.co/xadeviro/e74jchg/15139196236.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478127/normal_601b6ed661f6f.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/dojivewobasuval/bundesheer_uniform_sterreich_kaufen.pdfIn PDF document text
    • https://9579f988-9383-433c-acf3-5fff76e0c882.filesusr.com/ugd/191a6d_1768a4a5e752460e974096c7c25f4c93.pdf?index=trueIn PDF document text
    • https://fea67d75-dd3b-4bdd-af05-748e92ec8a52.filesusr.com/ugd/05900a_e34bad0a04a147bb86f1ee8df63ecb42.pdf?index=trueIn PDF document text
    • https://05282879-aed3-4f16-ac14-d534add4d4bd.filesusr.com/ugd/0f8b7c_dd42f28b47364bbc891b28674e3c5ac3.pdf?index=trueIn PDF document text
    • http://debagejusuwaj.epizy.com/nuxurexetifumijujekem.pdfIn PDF document text
    • http://tikawemukotuwaw.rf.gd/best_solar_powered_battery_tender.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/cen_tech_digital_multimeter_manual_espaol.pdfIn PDF document text
    • https://545b0fba-b68f-4464-8826-e8b601f8ca85.filesusr.com/ugd/bca722_a0cc30da08dd45738b63420090db7259.pdf?index=trueIn PDF document text
    • http://wesekiluxalema.rf.gd/what_grade_do_you_take_pre_algebra.pdfIn PDF document text
    • http://loxeputogojew.rf.gd/drawing_books_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/cool_magazine_templates_photoshop.pdfIn PDF document text
    • https://88211235-bf86-4d40-a6ec-a052db2f682e.filesusr.com/ugd/94e5ef_81ff4349a6424c5992c662b406708509.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/nowilowopanesotovumonuk.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/beyno_font_black_panther_free.pdfIn PDF document text
    • https://ebc1add8-0b9d-418e-9e4a-1e287827e933.filesusr.com/ugd/ab63e3_b121310a29e64c049a3ae5471876f2c5.pdf?index=trueIn 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_off000268aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x268AA 5608 bytes
SHA-256: 7abacd40df05112e0b984894137b9a28251da717c28121eab5579a7bb27560fe
font_01_sfnt_off00027ba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27BA8 11468 bytes
SHA-256: 8e0c3a604c201b1d07bf91462e2623af8568068cebd502f2e40ca2acc1a836de

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