Malicious PDF — malware analysis report

Static analysis result for SHA-256 15230b0091e4b13c…

MALICIOUS

PDF

67.2 KB Created: 2020-10-26 02:59:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 5084c00e29d9b770a8d040ce4b33d85e SHA-1: da030ac1d4f8a9847131b8bbd7e969acfd588593 SHA-256: 15230b0091e4b13cca2685668c7732c10dee4176159b4648b1d36ca03cff48b3
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.cc/123?keyword=characteristics+of+standard+language+pdf In PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/larulepa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369643/normal_5f951bd48407e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415964/normal_5f9615904c8f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369496/normal_5f888ca34593f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401711/normal_5f95ffcb6b851.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383698/normal_5f8d1a71f1f22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369318/normal_5f8fbc2378f87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369499/normal_5f91a7dfce987.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411498/normal_5f95b4c7e778d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368956/normal_5f925557b61cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367961/normal_5f8a509f0fde2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0667/1026/files/product_design_and_development_ulrich_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7526/5204/files/janozikumevetalen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8548/7516/files/iwalk_battery_charger_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7642/6144/files/vodupugekuguzo.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/nuvimiravivevebezidatifa.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/gefuligi.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/stories_for_grade_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8642/0397/files/basel_3_document.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3382/0836/files/74540850681.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_off0000ad5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD5D 5320 bytes
SHA-256: e7857b59a0a62303d98ab92961f5f4a626abf56360075eca76eefdc7411a669a
font_01_sfnt_off0000bf6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF6F 14952 bytes
SHA-256: a47eedaeb6c420c4a845d9f973450112e8b915d1660a17430a27f6861b2e7cf7
font_02_sfnt_off0000ea33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA33 16116 bytes
SHA-256: 55678a5190ab32087fccd00ff40cb9ee825cafa424f9300e1d07390d3bf96976