Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbc64e864a1dc355…

MALICIOUS

PDF

39.6 KB Created: 2020-08-19 07:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b31e4e695d5239657a38093178c5c152 SHA-1: 0c96b34517685cd09d96ca21650b6c03e7684409 SHA-256: fbc64e864a1dc3550cce4826ebf1744ed7eb8ca7f5aa9c129b9b83c6ad74a97e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a lure for 'Branca de neve filme completo dublado' and embeds a large number of links, many of which point to potentially malicious redirectors. The ML classifier strongly indicated maliciousness, and the presence of a known malicious redirector URL reinforces this assessment. The document's structure suggests it is designed to trick users into clicking through to a malicious site.

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.
  • 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.
  • 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.ru/pify?keyword=branca+de+neve+filme+completo+dublado In PDF document text
    • http://files.phillipsbanini.org/uploads/1/3/1/3/131398174/4577183.pdfIn PDF document text
    • http://files.pierrevanschalkwyk.art/uploads/1/3/1/0/131070212/dopab-gubimi-xilusakebapukik-pazokor.pdfIn PDF document text
    • http://sedudo.valeriecizek.com/uploads/1/3/0/7/130776208/141527.pdfIn PDF document text
    • http://files.byronbayhealthycommunication.com.au/uploads/1/3/0/7/130775017/sojapabozeneja.pdfIn PDF document text
    • http://kazaxi.zoefriedman.org/uploads/1/3/0/8/130873851/6b6384e9a38.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/1/0431/6204/2529/files/algorithms_for_interviews.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8950/7990/files/eichhornia_crassipes_caracteristicas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6318/0438/files/turojug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/14981909947.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1839/4523/files/90105431346.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21883700101.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1945/9998/files/zovijojanalufasapizepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7937/6798/files/55768403103.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7283/1134/files/convert_kindle_ebook_to_calibre.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1830/5179/files/57648300728.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2707/0104/files/buwazopax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9021/5073/files/rajemaxojogufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9575/2864/files/3765938974.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_off00004c5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C5F 5252 bytes
SHA-256: c3751dc46f040d341672613f027f2539e260f17d948ac9161af143c88fcf6ee0
font_01_sfnt_off00005e18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E18 11336 bytes
SHA-256: a24ce47a0217ad7f64927232103fc716c31d482e765fe4c080931e312d709420
font_02_sfnt_off00008156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8156 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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