Malicious PDF — malware analysis report

Static analysis result for SHA-256 7266c28480759787…

MALICIOUS

PDF

104.9 KB Created: 2021-05-09 05:58:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 13dfb75c5d3ec1419aacf4983bc0f8cd SHA-1: ab1275dec2dd032489c55ac5eb414b07712de869 SHA-256: 7266c284807597870216b6f467c4625d672f7d6f4dc6613ed1453b26a9dc7d3f
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 0.9992

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://xajibur.ru/strik?utm_term=english+conversation+lessons+for+adults+pdf PDF link annotation
    • http://ziziwujavoj.iblogger.org/artificial_intelligence_and_machine_learning_fundamentals_download.pdfIn PDF document text
    • https://dutofubexel.weebly.com/uploads/1/3/4/6/134631161/rofenawutesetaf.pdfIn PDF document text
    • https://powumebaporisav.weebly.com/uploads/1/3/4/8/134891471/e8411b6bf5f9f8d.pdfIn PDF document text
    • http://texifudosino.mygamesonline.org/03.06_employment_and_occupations_writing_assignment_answers.pdfIn PDF document text
    • http://sifimomikev.sportsontheweb.net/highlight_documents_on_ipad.pdfIn PDF document text
    • https://wofexajolevesi.weebly.com/uploads/1/3/5/3/135302186/sifuzakirekezudexi.pdfIn PDF document text
    • http://palipupo.22web.org/cbt_worksheets_for_teenage_social_anxiety.pdfIn PDF document text
    • http://marketitaly.info/6911716494sebs1.pdfIn PDF document text
    • http://lovemecompletely.com/88312882797x64bb.pdfIn PDF document text
    • http://megopoveguvujal.medianewsonline.com/algal_cell_structure.pdfIn PDF document text
    • http://manybigs.space/ingles_para_latinosznm15.pdfIn PDF document text
    • http://xididefix.22web.org/job_application_tracker_excel_template.pdfIn PDF document text
    • http://idealica-italiauficiale.website/31743372836g39he.pdfIn PDF document text
    • http://podarokinsta.online/tovuwibokodedukomesaxovar6udwp.pdfIn PDF document text
    • https://dudulisatosix.weebly.com/uploads/1/3/1/6/131637211/tinok-xapoxivewivobu-silagotunuwe-bagozofef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nekodigeteremi.rf.gd/searching_algorithms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f3b4d69-ddae-4729-ab1f-e49b5481a690/dell_62yvh_rev_a00_motherboard_driver_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd66444b-ebd2-4c9d-9109-e0afbac82ed4/12872798020.pdfIn PDF document text
    • http://nosigegu.onlinewebshop.net/all_causative_verbs.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/ethiopian_music_album_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fab701f-834f-4959-80d0-5d072d83b444/thule_bike_rack_ski_attachment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fdf5f8a-9aaa-4867-9033-639399f731b9/40919679587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/615c30f5-4ff2-41b7-92c8-18fdcb12946c/fokopenajudopem.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/who_dies_in_the_book_the_blood_of_olympus.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_off00015c5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C5B 5432 bytes
SHA-256: ea777e0e3c5eeac99dcfabb75898018608dba4c7f497bc2badd054e29f17fbaf
font_01_sfnt_off00016ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EE8 11584 bytes
SHA-256: 2c4434b1b8a98d5e5ca2577e35074bcca754e9ab1ea5744ed2d1abb47fbb1735