Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c28971dfad08725…

MALICIOUS

PDF

75.3 KB Created: 2021-03-21 09:31:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: be60895f8eb0601cb0c8da56d54ac3f7 SHA-1: 85acffe96592d6b08fb71df6671d104a68c66123 SHA-256: 8c28971dfad087258305c2d0e5346cc43f67ff3edbf9bc1b87d19b2c6c7a64bd
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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://jottigo.ru/wix?keyword=animal+crossing+new+leaf+style+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445869/normal_6049c3cebf36c.pdfIn PDF document text
    • http://spainsale.pro/nufavuwic7q2k.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/42727047317.pdfIn PDF document text
    • http://copyrighthelpbusiness.net/cambridge_igcse_ict_theory_workbook_free_downloadx06za.pdfIn PDF document text
    • http://cmbmarketing.agency/prentice_hall_conceptual_physics_textbookixah3.pdfIn PDF document text
    • http://boforotaje.mywebcommunity.org/concrete_batching_plant_calibration.pdfIn PDF document text
    • http://zurujavurobe.scienceontheweb.net/gagimudezijosago.pdfIn PDF document text
    • http://xxlmature.site/pumoxibixafumatitilal1cfu5.pdfIn PDF document text
    • http://nuwetiveguvo.mypressonline.com/kosedetepazewagun.pdfIn PDF document text
    • http://ogranicbio.fun/baby_boss_full_movie_download_in_hindi_720p_bluray5g3ne.pdfIn PDF document text
    • http://xofajenakimexo.iblogger.org/fodexopex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404285/normal_600e5987b91cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484812/normal_602025bec4839.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://valupakukav.myartsonline.com/how_to_know_if_my_fish_is_male_or_female.pdfIn PDF document text
    • http://rutuvofogiseba.epizy.com/2018_yearly_calendar_template_word_editable.pdfIn PDF document text
    • http://kinutumuzikuji.epizy.com/astm_a106_b.pdfIn PDF document text
    • http://pojuzuduxotazup.epizy.com/mufupadalin.pdfIn PDF document text
    • http://logiweliziweje.onlinewebshop.net/administrao_pblica_patrimonialista_burocrtica_e_gerencial.pdfIn PDF document text
    • http://zegasitopa.epizy.com/46227493066.pdfIn PDF document text
    • http://jawuwibunoropo.atwebpages.com/15761536967.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_off0000e753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE753 5524 bytes
SHA-256: 170d794498b9d772022368535cb9f08d05dd6514ac960d5ed057b26a2d60e931
font_01_sfnt_off0000fa13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA13 11540 bytes
SHA-256: 9bd3e920c9bc6c6148c4ea3d6d124f5e37928948f8d984199cab94a127eb3d44

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