Malicious PDF — malware analysis report

Static analysis result for SHA-256 23dfd8728fefdb10…

MALICIOUS

PDF

65.7 KB Created: 2021-01-23 00:01:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e88203f33065ab67f1ca5e3bef89bb7f SHA-1: 56f09c70676f6fc1384f28343d2c4efbaad42423 SHA-256: 23dfd8728fefdb10a42a153a0a1bde181a52f14a229ab41cda361bc0f5b65512
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wb?keyword=light%20up%20wreaths%20for%20windows PDF link annotation
    • https://cdn.sqhk.co/fepogosu/hYhg2gi/fruit_candy_blast_game_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/aagadu_movie_video_songs_hd_1080p.pdfIn PDF document text
    • https://mezemefi.weebly.com/uploads/1/3/1/3/131384279/nunuvopeko.pdfIn PDF document text
    • https://site-1242245.mozfiles.com/files/1242245/best_medication_reminder_app_android.pdfIn PDF document text
    • https://site-1177444.mozfiles.com/files/1177444/30685340363.pdfIn PDF document text
    • http://filuniguwol.22web.org/bsf_online_form_10th_pass.pdfIn PDF document text
    • https://valabonef.weebly.com/uploads/1/3/1/3/131379230/fobisorafosorixi.pdfIn PDF document text
    • https://site-1185297.mozfiles.com/files/1185297/spider_solitaire_card_game_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477651/normal_5fd898485c7b5.pdfIn PDF document text
    • https://zugimawaxudal.weebly.com/uploads/1/3/1/4/131410952/d6a06b0ed59e1.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/tebasabuzimum.pdfIn PDF document text
    • http://rivuxini.66ghz.com/27102117209.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503791/normal_6004b6c52c418.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bilunijo.epizy.com/unit_impulse_function_laplace_transform.pdfIn PDF document text
    • http://mikesivu.rf.gd/circular_motion_lab.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_off0000c345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC345 5304 bytes
SHA-256: d8029b40f6d51553c3c2c19443981da5bcee29b243590067a04e27c0cb188254
font_01_sfnt_off0000d564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD564 10352 bytes
SHA-256: 874a019c50ccbd1e7b3e3c92b0beb610c5ec237e9546b7a0247e34c484439469