Malicious PDF — malware analysis report

Static analysis result for SHA-256 daae87e07798ceb3…

MALICIOUS

PDF

78.4 KB Created: 2021-05-07 12:08:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 17cd3f486fc67c5312147b373d9753ba SHA-1: 15824df8c9f8bb5d4aadecb9cc3759e8ca0aaff5 SHA-256: daae87e07798ceb3d3f9baa215d2932cfe741507d131312bf045b9a3f03d9002
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 0.9993

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://leonvi.ru/strik?utm_term=htc+verizon+4g+lte+hard+reset PDF link annotation
    • http://najapizarut.22web.org/memory_rescue_download.pdfIn PDF document text
    • https://cdn.sqhk.co/buganisazobu/gcjdzfz/ctls_parent_square.pdfIn PDF document text
    • https://cdn.sqhk.co/wamiratena/UJhchjn/vertex_form_to_intercept_form_converter.pdfIn PDF document text
    • http://profyhouse.ru/86818499036oz0ck.pdfIn PDF document text
    • https://tegedibinatamam.weebly.com/uploads/1/3/5/3/135350324/c6e76955.pdfIn PDF document text
    • https://cdn.sqhk.co/fosuzonarefi/hjahbij/10801044869.pdfIn PDF document text
    • https://guxenebulofoto.weebly.com/uploads/1/3/2/8/132814975/dirudoramelovapozala.pdfIn PDF document text
    • http://levantemosaic.com/how_to_check_voicemail_on_doro_phonekcfc7.pdfIn PDF document text
    • http://servicesforsupport.com/ferunamec390i.pdfIn PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/xozumiteduvome.pdfIn PDF document text
    • https://cdn.sqhk.co/rexukewanej/K9aigjj/xesokiwenod.pdfIn PDF document text
    • https://ginekimef.weebly.com/uploads/1/3/0/7/130738874/gopojujeferetef-lixelepe-sevusaj-forunevunawobig.pdfIn PDF document text
    • https://bewodopogogubak.weebly.com/uploads/1/3/4/8/134886142/b347eb4c783b420.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/nutanigonu/pakistan_studies_book_for_class_9_in_english_2020.pdfIn PDF document text
    • http://xoxinazur.rf.gd/cost_of_building_a_loader.pdfIn PDF document text
    • http://palalujopaxuv.epizy.com/instep_quick_n_ez_double_bicycle_trailer.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/how_to_change_zoom_audio_settings.pdfIn PDF document text
    • http://lowebabufi.rf.gd/3d_cartoon_car_model_free.pdfIn PDF document text
    • http://bigisokuwes.epizy.com/after_12th_arts_courses_list.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/nasologezosal.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/33394345456.pdfIn PDF document text
    • http://gifexepes.rf.gd/duzufe.pdfIn PDF document text
    • http://natipezosepe.rf.gd/differential_calculus_introduction.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_off0000f073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF073 5360 bytes
SHA-256: 13eee23f7ad3c6628e48457ceae635aa89c503c07ab21763954f1191fafa5e4b
font_01_sfnt_off000102b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B7 12408 bytes
SHA-256: 9b4e6015bbfdbdc7ff6c8c4354f3207de80f17cf2625b848d661078ac58eb935

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