Malicious PDF — malware analysis report

Static analysis result for SHA-256 17c6e0dd36f0cea8…

MALICIOUS

PDF

74.7 KB Created: 2021-06-08 18:36:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f8b77a5ce918f140607c93c27722d0fe SHA-1: 16aea2ece944cea3e0fb64b71cff968c611f77fd SHA-256: 17c6e0dd36f0cea8ee78e021fd5ff70c4207d6af28d5ad438cb7629a943efe94
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 0.9995

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://nomylo.ru/pbw?utm_term=short+passages+for+main+idea PDF link annotation
    • https://xaledojasuk.weebly.com/uploads/1/3/0/9/130969600/8116834.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464521/normal_6029b70cded75.pdfIn PDF document text
    • https://lenudigibelap.weebly.com/uploads/1/3/7/4/137499492/duvisemagibi_buxab_japix_guduko.pdfIn PDF document text
    • https://tumotasefon.weebly.com/uploads/1/3/5/3/135317172/sonakagilokoj_serezatijepaze_xatemu_birivon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465394/normal_6005766597498.pdfIn PDF document text
    • https://fegajasun.weebly.com/uploads/1/3/4/5/134502742/6770069.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380392/normal_60419097b2dcb.pdfIn PDF document text
    • https://dawutika.weebly.com/uploads/1/3/1/4/131407504/napafame-pumejodifubit-newatezobilu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://natutaliva.pbworks.com/w/file/fetch/144539961/panda_antivirus_pro_2020_activation_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81ce1dad-622c-4a19-88c5-5d2811ac39f4/jekujakumuzapasorov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64c82b9e-d1d3-4ece-bca1-6e9f0e283e2d/34908149118.pdfIn PDF document text
    • http://sutodoromar.pbworks.com/f/75939696254.pdfIn PDF document text
    • http://lugozamuxika.pbworks.com/f/future_continuous_tense_worksheets_with_answers.pdfIn PDF document text
    • http://zanikofepaj.pbworks.com/f/chapter_6_chemical_bonding_study_guide_answers.pdfIn PDF document text
    • http://xejujaser.pbworks.com/w/file/fetch/144826749/91205131707.pdfIn PDF document text
    • http://pefumugat.pbworks.com/w/file/fetch/144853569/can_you_cross_into_mexico_without_a_passport.pdfIn PDF document text
    • http://poforezufovu.pbworks.com/w/file/fetch/144432981/zefatovavajejivonijinoxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11fb14d2-3638-422f-965b-372f8083b3fd/09_chevy_cobalt_service_tire_monitor.pdfIn PDF document text
    • http://najajufuf.pbworks.com/f/rapport_de_stage_mcanique_automobile.pdfIn PDF document text
    • http://pulixojesu.pbworks.com/f/47331898137.pdfIn PDF document text
    • http://padimagofo.pbworks.com/f/suicide_squad_2_full_movie_free_download_in_hindi.pdfIn PDF document text
    • http://viluxese.pbworks.com/f/34808297370.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_off0000e544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE544 5524 bytes
SHA-256: b983d23a53e301d1cc4648fcdb5160e7e35f5d42f18965d1f8faea2c1f473964
font_01_sfnt_off0000f7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DF 11808 bytes
SHA-256: 06d62f81f7d79c1e4f4c79f50ca2c4442da94de65521d3dd2b59336869766c26

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