Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7acfe68bd0f7557…

MALICIOUS

PDF

77.5 KB Created: 2021-04-24 15:32:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b0106905d86524be6deffd6a93deea88 SHA-1: 88eeb4919bef5ab3c3b43865de469d94a74835cc SHA-256: e7acfe68bd0f7557bf187958555f87652bd3675777518a0edff3f3d23d4f6800
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 0.9991

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://xezojetit.ru/strik?utm_term=uc+berkeley+data+science+major+reddit PDF link annotation
    • http://jesawukimefix.mypressonline.com/cateye_cc-mc100w_setup.pdfIn PDF document text
    • https://dubibezu.weebly.com/uploads/1/3/1/4/131453247/godona-xokopas.pdfIn PDF document text
    • http://sepozimog.scienceontheweb.net/let_us_cling_together_wiki.pdfIn PDF document text
    • http://xuvaxujogilo.mygamesonline.org/britax_pioneer_car_seat_expiration.pdfIn PDF document text
    • https://cdn.sqhk.co/fekigimuzib/CjfZpjb/fashion_play_barbie_1987.pdfIn PDF document text
    • http://fisuruwibowin.66ghz.com/chinese_language_manual.pdfIn PDF document text
    • http://difavusimope.iblogger.org/leveson_efficiency_report.pdfIn PDF document text
    • https://nilukosezaxed.weebly.com/uploads/1/3/0/8/130814529/5905223.pdfIn PDF document text
    • http://finofubamu.mygamesonline.org/batepesezigoge.pdfIn PDF document text
    • https://zavuvomexuwu.weebly.com/uploads/1/3/2/7/132740545/789c8d644ec8.pdfIn PDF document text
    • https://cdn.sqhk.co/tozegatopaxu/idLijI5/fitbit_inspire_2_review.pdfIn PDF document text
    • https://cdn.sqhk.co/temazajilib/qhayiay/46809580716.pdfIn PDF document text
    • https://cdn.sqhk.co/moxulofilose/eSggic5/nemimixowokunuko.pdfIn PDF document text
    • http://jotelefaxomawut.22web.org/doxumuzanajiruditedomiwa.pdfIn PDF document text
    • https://cdn.sqhk.co/wemitupu/XJ0zOjc/dunodaxonavuf.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/rirusozo/creating_shared_value_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/aprendizajes_clave_curso.pdfIn PDF document text
    • http://pozijirume.rf.gd/jitatuganew.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/herman_miller_aeron_chair_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/template_ppt_dan_animasi_free.pdfIn PDF document text
    • http://bafovupopevepus.epizy.com/toyota_camry_se_2018_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/gizufi.pdfIn PDF document text
    • http://tuzuxutetug.atwebpages.com/swagger_documentation_generator.pdfIn PDF document text
    • http://gogujigasad.onlinewebshop.net/bovigaxolidudapebu.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_off0000ef20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF20 5456 bytes
SHA-256: 86f2f3d17295ed38740ec4e23db5e1170aec73459b454bfa8640db6dd9a93549
font_01_sfnt_off000101a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A6 11484 bytes
SHA-256: 137ff1ac03554c1b01e53d719761eb02bdedbace32f70e9a0da3674271218e29

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