Malicious PDF — malware analysis report

Static analysis result for SHA-256 e422e5ddd5e45676…

MALICIOUS

PDF

43.9 KB Created: 2020-08-17 05:53:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: bd361e954a3b63a19562360671b6d3c6 SHA-1: f7a21916b572ff0d796cf33288d5841df767c567 SHA-256: e422e5ddd5e45676d6956c8c72d76aa8bdb283cac6e1ee6c0ae20bfd3c5d3be7
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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.com/pify?keyword=broken+song++ringtone In PDF document text
    • http://files.creatingculturalcompetencies.org/uploads/1/3/2/7/132740480/8271588.pdfIn PDF document text
    • http://files.faisalmohyuddin.com/uploads/1/3/0/7/130739719/414c2.pdfIn PDF document text
    • http://files.sparkfoundation.ca/uploads/1/3/2/8/132814371/970ad44f5df489.pdfIn PDF document text
    • http://files.nourkabbara.com/uploads/1/3/1/3/131379718/wonuzora-walirerej-nurotomijudupik-xijemegir.pdfIn PDF document text
    • http://files.bedfordpsychologists.com/uploads/1/3/0/8/130873945/9640771.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8761/7436/files/82412425931.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5420/2013/files/primary_secondary_tertiary_quaternary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8268/6367/files/logical_framework_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5935/5556/files/pataferunimeduv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zavoriduxosijalas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0448/6055/files/sri_devi_bhagavatam_telugu_book_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0161/8330/files/82923161037.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4581/3413/files/jurnal_cacing_pita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7872/7318/files/47834617607.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6261 4512 bytes
SHA-256: 2b853f1d5ba3024e6e90f466b406ec783272b2616c062fff1434adec2a1219d0
font_01_sfnt_off000071c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71C4 10284 bytes
SHA-256: 5813ac017260f2afebdb9fdcc10f07d47107aa5c3b0b8f3067ed18e4405c9af8
font_02_sfnt_off000094e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94E9 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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