Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8b99b2d45a89a67…

MALICIOUS

PDF

42.0 KB Created: 2020-11-06 10:11:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 0104b7224bd2dd611a2ee1e8c4563115 SHA-1: 65b569861a9de50e1a51a76cbc7e29c3d839246e SHA-256: f8b99b2d45a89a67e5bddda151bbde5e4bc648468a5c2d5bebab749719a1de59
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://traffine.ru/aws?keyword=katy+hearn+supplements+review In PDF document text
    • https://lisiladojorinin.weebly.com/uploads/1/3/0/8/130874519/d2010f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366653/normal_5f9002955d904.pdfIn PDF document text
    • https://madajeguruxe.weebly.com/uploads/1/3/4/3/134348767/4053246.pdfIn PDF document text
    • https://gogipemefa.weebly.com/uploads/1/3/4/4/134471158/0e44713d3a900.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/zuxadol/breach_of_contract_letter.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/92369775752.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/ragnarok_clicker_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/55767163297.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/osrs_monkey_madness_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/bepemisegebajotov.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/indian_legal_dictionary.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_off0000649b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x649B 5284 bytes
SHA-256: 19375f16a6a161d48840e97214b2c7e6f716b9055f23a896c2b8f629faff1664
font_01_sfnt_off00007684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7684 10772 bytes
SHA-256: a9fb049b409c3c14ca8552f749664fb5eaf84dfed383e041f5686de9da2ba2e9