Malicious PDF — malware analysis report

Static analysis result for SHA-256 e54231826a63c36f…

MALICIOUS

PDF

70.3 KB Created: 2021-03-09 01:23:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7b888ac225e7bba49c48ab71921c44ce SHA-1: 998373ed79b7b059ae99b080972875388394237c SHA-256: e54231826a63c36fa9c315fe02b957105f04ec108fada93a644c2fdd6db3d4e8
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://bologen.ru/award?keyword=bibliografia+apa+libro+pdf PDF link annotation
    • http://viruxego.mygamesonline.org/five_nights_at_freddys_free_game_no_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_a5848f3c7c8f4f39bd6d6e327f82e64d.pdf?index=trueIn PDF document text
    • http://wopojofa.atwebpages.com/18921721595.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c7e40b9-2e40-4775-8e2a-5716445f343f/how_to_repair_honda_civic_hybrid_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/income_statement_template_google_docs.pdfIn PDF document text
    • https://d3df31c7-72fe-42b1-a92e-0723e8ed7a16.filesusr.com/ugd/5bf82b_3a3df1ffd47d457e99745880e5b8320e.pdf?index=trueIn PDF document text
    • https://e7a36954-f88c-49e1-9707-d680c47d06dc.filesusr.com/ugd/b0b521_64a5c83b607347afaed75da2bf944a77.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/80af4a81-75d9-4ceb-8e3d-0708b02dde5f/handy_stitch_handheld_sewing_machine_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fe6a8d1-64f3-48ee-bfb0-32dc66dc02fc/mvcc_business_office_email_address.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/664e7a69-5420-4d8a-b751-9b44dc642894/a_and_p_john_updike_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/descriptive_writing_examples_gcse.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/basketball_wallpaper_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/treasurer_s_report_template_non_profit.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/cash_advance_form_word.pdfIn PDF document text
    • https://299bc67c-4c9a-44ea-852c-18f2d39dca40.filesusr.com/ugd/954c8b_5bf3e51b43df4930b2bafec4f4b1814c.pdf?index=trueIn 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_off0000d77b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77B 5220 bytes
SHA-256: 7dcb7c42781f90bea940ce45aa6a1e3fe1abfec7ceee6951c548b99e99121720
font_01_sfnt_off0000e951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE951 10600 bytes
SHA-256: da13fd28900d8dbb55a608964ddf4c9dddea34e0e953723017d8e85720cd10ba

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