Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d3bfa3b343c9c49…

MALICIOUS

PDF

75.1 KB Created: 2021-03-18 10:14:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: af1dda7b792e527e34ba4fa3d5ea1dfa SHA-1: 5f5cc7b4bd367964503e6953bce32fd70d7ca92f SHA-256: 9d3bfa3b343c9c495012a0598771a8f8439c99063d57b9be342c9e09df10e4e9
126 Risk Score

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://druttle.ru/123?utm_term=drawing+inferences+worksheets+4th+grade PDF link annotation
    • https://cdn.sqhk.co/pabopimi/Xij6ie8/34864981675.pdfIn PDF document text
    • https://nekitunanozot.weebly.com/uploads/1/3/5/3/135346928/dirikasemozup.pdfIn PDF document text
    • http://pay-order.info/how_do_i_factory_reset_my_iphone_6_plus_without_itunesdfspg.pdfIn PDF document text
    • https://jetapixivokob.weebly.com/uploads/1/3/4/7/134726526/0f4533a1dd87469.pdfIn PDF document text
    • https://cdn.sqhk.co/wofetewa/eCgiPPe/italian_musicians_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/fasotaluvose/hSYBbIi/amc_30_mesquite_movie_times.pdfIn PDF document text
    • https://cdn.sqhk.co/lilavokolet/heialid/87343767005.pdfIn PDF document text
    • https://cdn.sqhk.co/topazawu/geheZCl/devlet_opera_ve_bale_ankara_program.pdfIn PDF document text
    • http://sumidabitax.iblogger.org/89133509174.pdfIn PDF document text
    • http://whalesqpa.fun/countdown_template_premiere_pro4v08z.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/qhi0jdE/running_horse_watercolor_painting.pdfIn PDF document text
    • https://gawufuxawejax.weebly.com/uploads/1/3/1/8/131855981/dexenizonalazawafev.pdfIn PDF document text
    • http://pitushok.space/ralph_waldo_emerson_quotes_government0x112.pdfIn PDF document text
    • https://cdn.sqhk.co/pumafuki/x3jaxhc/how_many_episodes_of_warehouse_13.pdfIn PDF document text
    • http://salonop.xyz/tipos_de_sistemas_operativos7vjwr.pdfIn PDF document text
    • https://wimowago.weebly.com/uploads/1/3/0/7/130775393/e23f97c04.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wifapejaxim.rf.gd/what_is_the_fruit_of_the_poisonous_tree_doctrine_examples.pdfIn PDF document text
    • http://wapolijo.epizy.com/atomic_structure_iit_jee_notes.pdfIn PDF document text
    • http://xaxizigof.rf.gd/rccg_sunday_school_teachers_manual_3rd_january_2021.pdfIn PDF document text
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_6350eb457b0549d5bb95c548f9f99e5d.pdf?index=trueIn PDF document text
    • https://ab60d57a-1f92-408f-9079-0b325776b613.filesusr.com/ugd/724fb5_00653b2a238b4ed5921173d67616fda9.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_off0000e985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE985 5492 bytes
SHA-256: e6aaa3b7d800694c754763dfc0ddd87951159afaa2595fa3514d888f08fd1e23
font_01_sfnt_off0000fc56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC56 10228 bytes
SHA-256: fbb3dbe3b3278d1abb71c2e7be1e137fb6bf761c5283d43e37acd40825c33de1

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