Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff0b59a145818c4…

MALICIOUS

PDF

65.2 KB Created: 2020-12-04 03:58:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-09
MD5: 28359968bafe198aec6653a988be01b9 SHA-1: 08127ea26a38f0bc142fcf21e51a17f6a44062cf SHA-256: bff0b59a145818c46c4719315feaf53081184ab39432af501a03a52a1bf48b73
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/aws?utm_term=rectangular+waveguide+characteristic+impedance In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383475/normal_5fa330be93049.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393029/normal_5fb5149e1b67d.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/tazopaju/ic_atmega328p-_pu_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/waruxowufuxug.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/44081894974.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd00221af5bf52c327b691/1606221859686/reluz.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/can_distance_be_negative.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/rogue_one_dvd_release.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2b45ca87939686413d8d4/t/5fc71255b7521d608a3d9333/1606881886844/blender_bullet_physics_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4deb088c99b6d37c0af76/t/5fc52ccc3485235c866d1bee/1606757580618/majufefufaxexen.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/ladized.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5402c6609fd0ee7ae1977/t/5fc689255147b148041649e0/1606846757832/tidiretabulixenifavebag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae639c47-4377-4076-8949-7053e7ff283a/540196857.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a62325cd-1a68-4451-b016-796101c6c2da/kyocera_solar_panels_camping.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e940bd14ff0dd29cb4d3/t/5fc332f2f8cdb769c64b87f7/1606628089681/3724974430.pdfIn PDF document text
    • https://doi.org/10.1002/ecjb.4420750506In 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_off0000c0c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0C5 5648 bytes
SHA-256: 8efee8438c252c212456a294d6536adc552d59d2ac6105bb298c966c7abafdf7
font_01_sfnt_off0000d3e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E8 10536 bytes
SHA-256: 6e408d75be03ed677fbbaf767571ab0f0458e52f160aa43d40850f4803d3ce33

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