Malicious PDF — malware analysis report

Static analysis result for SHA-256 b91eb32c0b5e1bcd…

MALICIOUS

PDF

45.0 KB Created: 2020-11-05 16:33:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 6228e09f21d7474dc5219b53f40d6af7 SHA-1: 0f177fad5299654b5118a56f7580b2eedb2febb0 SHA-256: b91eb32c0b5e1bcdd694fb4212f477afdbd75e61d79857d4a86fdbc02581fedf
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/123?keyword=habbo+hotel+apk+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420239/normal_5fa37804d97e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383146/normal_5f9ad14e19197.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/majimemo_sazuzeronob_malotupofe_somije.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386349/normal_5f9a73886bfaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380411/normal_5f8e038311f88.pdfIn PDF document text
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/nifudigutedej_lezuzakuripazo_vaxaporaxajuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387815/normal_5f8e70214694a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370071/normal_5f895c7a5b572.pdfIn PDF document text
    • https://milavigik.weebly.com/uploads/1/3/2/8/132815866/9a918cc3f2b.pdfIn PDF document text
    • https://vevejeda.weebly.com/uploads/1/3/0/7/130776099/sutarot.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/3a671378-678f-461b-9cda-b44b53d8adaa/99689706030.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/gojul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce31abb9-521a-4e7f-b2a3-7cafd7c78c52/41991049863.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e1950de-cac0-4006-8899-75c5e710aca3/34130264627.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7ed7e29-8a79-4ec8-82ba-1926889f325d/20971576350.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/10328579033.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ec125cd-8d84-40a8-b341-9dbedca3bea3/audible_deal_2020.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0D 5032 bytes
SHA-256: 4b1313b016dde48d36606c085615e81609adca6f894bce0ba3f4d12746684ad4
font_01_sfnt_off0000702d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x702D 9856 bytes
SHA-256: 28867aea466809bb2da934460e6b3732fa4983aaca07643da93c98c47ce1828f
font_02_sfnt_off000091dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91DD 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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