Malicious PDF — malware analysis report

Static analysis result for SHA-256 8030e616281fb59f…

MALICIOUS

PDF

73.9 KB Created: 2021-03-09 11:28:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c265e21a52adfdf058dcd8e74d05ee77 SHA-1: d09fc5fab4a9df6930f5c17d23b27a9a35c0b664 SHA-256: 8030e616281fb59fee93727c64fbd21bccf4b802ca1e2043cebf21c8da366d5b
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 0.9996

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://jumiwimov.ru/123?utm_term=cdf+in+relation+to+pdf PDF link annotation
    • http://vifedefodukamas.22web.org/how_to_set_time_and_date_on_citizen_blue_angels_watch.pdfIn PDF document text
    • https://bubiwodepu.weebly.com/uploads/1/3/2/8/132815961/magajasalafisasovik.pdfIn PDF document text
    • http://circleshtang.xyz/digitech_gnx3000_software_downloadnbytg.pdfIn PDF document text
    • http://heleogose.online/206207352040qacg.pdfIn PDF document text
    • http://bogozopato.iblogger.org/mawogenoronekorarutasugum.pdfIn PDF document text
    • http://handler-autoscout24.com/functional_programming_in_pythono86dv.pdfIn PDF document text
    • http://uchebnoe.website/dufixabivoxiligawotecnqqg.pdfIn PDF document text
    • https://rojanudase.weebly.com/uploads/1/3/0/9/130969060/debojovafegerusaz.pdfIn PDF document text
    • https://nejavedejelije.weebly.com/uploads/1/3/4/3/134336697/154eccd2.pdfIn PDF document text
    • http://spoonnumberone.xyz/oscar_fish_size_by_agej59mz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/78121464-42e9-4ab5-a81b-b35f37963722/25_hp_johnson_boat_motor_for_sale.pdfIn PDF document text
    • http://wolobugoxew.myartsonline.com/famebazarufite.pdfIn PDF document text
    • http://laxunuwozen.epizy.com/jutowekatenewales.pdfIn PDF document text
    • http://fuzariwa.rf.gd/60950476079.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58eded83-3568-4403-b6b8-fd6b476f38d4/1201726416.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/episode_guide_chicago_fire_season_8.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/86448163090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37ae7ab8-1d47-44ad-a71c-70ae8a6a9bfc/95742397040.pdfIn PDF document text
    • http://dijipola.onlinewebshop.net/cristianismo_puro_e_simples_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3790d3f4-8db3-40c9-a1a0-7a952fb4d5bd/problemas_de_la_educacion_en_mexico_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47453c94-fa97-4f26-aba6-55fdf099b675/7782187591.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_off0000e499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE499 4760 bytes
SHA-256: bf0ba724963099d3f53d25187ee6a303cc12dc449113caa1882832308daa191e
font_01_sfnt_off0000f4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D2 10960 bytes
SHA-256: 826bf5710770307bca3129195a6cf7acaf915f8adfaacfe59c177ef3a7c8bb72

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