Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aa07ac76ea96c81…

MALICIOUS

PDF

83.0 KB Created: 2021-05-12 18:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8d201d3b346968e04d299711c3a77654 SHA-1: 76a6a58fb0b9a59586efd7e8629fcca5e8b09c29 SHA-256: 3aa07ac76ea96c81a900a6659072db15fc359b0b29b7d952320d03f8f7733217
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9990

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://druttle.ru/strik?utm_term=club+corners+car+wash+prices PDF link annotation
    • http://fukazab.mywebcommunity.org/90835082962.pdfIn PDF document text
    • http://qupieasy.online/thesaurus_activities_for_4th_gradem2yzv.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/35234453779.pdfIn PDF document text
    • https://luketekovagitor.weebly.com/uploads/1/3/4/2/134236109/jojigi-wobajezi.pdfIn PDF document text
    • http://brosbass.com/wofevogimuvixinunl7t0d.pdfIn PDF document text
    • https://nifusesoporiw.weebly.com/uploads/1/3/5/3/135309858/vuvejoganejomip_judex.pdfIn PDF document text
    • https://jikizukudelo.weebly.com/uploads/1/3/4/8/134879768/zefamurowo.pdfIn PDF document text
    • http://juxowupekabaf.mygamesonline.org/tokid.pdfIn PDF document text
    • http://strongcreditscore.info/gavafuguzozolajipcemx.pdfIn PDF document text
    • http://xtrading.buzz/51976792730bsfcw.pdfIn PDF document text
    • https://toruruxixe.weebly.com/uploads/1/3/4/6/134698343/pozinosis.pdfIn PDF document text
    • http://wowevopopof.22web.org/molecular_cell_biology_impact_factor_2017.pdfIn PDF document text
    • https://sukowuxipimo.weebly.com/uploads/1/3/4/3/134318810/dodafututa.pdfIn PDF document text
    • http://qunit.space/android_mobile_game_emulator_for_pc52k0g.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://fujebudavitasoz.epizy.com/free_printable_refrigerator_temperature_log_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/38444453174.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/what_is_the_purpose_of_research_studies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/971d922e-e985-4b80-8ffd-6cc996fd464b/8-4_practice_b_angles_of_elevation_and_depression.pdfIn PDF document text
    • http://zumijuxuv.epizy.com/invertebrate_paleontology_by_clarkson.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/sonda_vesical_tecnica.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/rezekofite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92d32758-77fb-4f53-a075-14c399494699/kavenepajovak.pdfIn PDF document text
    • http://tapoloferazuziw.atwebpages.com/chaganti_koteswara_rao_books.pdfIn PDF document text
    • http://bujijawuta.atwebpages.com/86232276299.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_off0000f6ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BA 5076 bytes
SHA-256: c471672a37ff4f6d7985f0e9c7d7f50b5a5046fd877de747d7327ce5978b7980
font_01_sfnt_off000107ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107EF 11716 bytes
SHA-256: 87d602d0ae422c42b447e47dd33356d11a362a04ed0d9fbfc0d901961a08d71e
font_02_sfnt_off00012fd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD3 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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