Malicious PDF — malware analysis report

Static analysis result for SHA-256 d789851a1291b6a8…

MALICIOUS

PDF

39.6 KB Created: 2020-10-26 01:23:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 68e7298cb1bfb197c79fe31520c67205 SHA-1: 01e8d3ba3ee3a70338f0722557501859b707312b SHA-256: d789851a1291b6a8867c420c1858cf91e1d7ff94334b08f394934f091b2bd180
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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://ttraff.me/123?keyword=whirlpool+microwave+manual+wmh31017hz In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373248/normal_5f91c7ff2eba6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402481/normal_5f95fba71386d.pdfIn PDF document text
    • https://fobewesepujub.weebly.com/uploads/1/3/2/3/132303403/gigaxebakoroj-devobefew.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/jemudezuwewojozevamu.pdfIn PDF document text
    • https://zusaneji.weebly.com/uploads/1/3/0/8/130813769/661864.pdfIn PDF document text
    • https://rizowexerezo.weebly.com/uploads/1/3/4/2/134265486/9671898.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/xanebavifamopez/kolefemajomesow.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/advertisement_design.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/malayalam_english_dictionary_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c377376-25d3-44bd-ac01-d026b62f0af3/43999470367.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff9eb2a6-dce6-4cc7-bf47-365676798c09/wisenajosivugigijiper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9dbb818-34e1-478e-8c32-0ba0ec6c5954/flavien_allenspach_und_sabine_dahind.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d4702f0-f395-4725-81aa-d282bf60141f/el_sobrino_del_mago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/516d91cd-49fb-44ba-a126-34664431f069/wekomupuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27e49251-4231-4d71-822e-9572ef8f5f2e/zozawuvigoseso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adc3f496-c974-44a0-ae24-857a01db6b29/buxeremap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/000ab0b8-c682-4fd4-958e-9ce916c12d34/examkrackers_mcat_biology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6150c9f-56df-4a7b-8da8-d2883d5f653e/xebodowazusujogumemaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2d8cb63-bffd-4c0c-8a8d-d658dbd79d6e/calcul_cot_triangle_rectangle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbb03440-9d51-4905-bee8-3f58810f6655/gunirevarusifumezoj.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_off00005a46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A46 5648 bytes
SHA-256: 025830395d985b0b89430c67f2b9c384dfe4b1025e69426785f24745700056c6
font_01_sfnt_off00006d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D83 10616 bytes
SHA-256: e9eca92f2aaa120d3b3922dd730a075d9548fb8c5ba5f4eb90f0f21db0c311ba

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