Malicious PDF — malware analysis report

Static analysis result for SHA-256 a66036e329cc6be0…

MALICIOUS

PDF

49.9 KB Created: 2020-11-06 10:18:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 2a7d4b330c1ce86ce570d4d9ec0a220c SHA-1: da4ff5bb6e826d776649bce62fe68e3233975c43 SHA-256: a66036e329cc6be0999cf6786af244cafb960076dd5e08397c10edfa46e627cb
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://traffking.ru/aws?keyword=firenewt+warrior+5e In PDF document text
    • https://rumorima.weebly.com/uploads/1/3/4/3/134307849/7190987.pdfIn PDF document text
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/wasujumiparuzafefage.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368953/normal_5f95aa2b27456.pdfIn PDF document text
    • https://xukanimuwuvam.weebly.com/uploads/1/3/2/6/132696198/ccc27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387241/normal_5f9ef3a74ff36.pdfIn PDF document text
    • https://dogirewepa.weebly.com/uploads/1/3/1/8/131856222/1f00004be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369318/normal_5f9b5fe5985df.pdfIn PDF document text
    • https://juzapojoxop.weebly.com/uploads/1/3/4/3/134370352/tawuzo.pdfIn PDF document text
    • https://rezizeme.weebly.com/uploads/1/3/0/7/130775554/7965169.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/kavitokolezub/refractive_error_of_eye.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/longman_dictionary_of_english_idioms.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/metasploit_product_key.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/kobepeb.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_off00008686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8686 4640 bytes
SHA-256: 59e582c10ae2d16bf32848c85be9d4556f0cb37b5d01e5dd9c88b56a545ce9c6
font_01_sfnt_off00009674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9674 10668 bytes
SHA-256: 0ab9bdd800906a33f8f8567e8a48d31572db48fda4914c85a965628ca78a1f7b