Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b0583dabdd78218…

MALICIOUS

PDF

35.4 KB Created: 2020-08-28 09:26:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 50da88eca58d04a05d5bbc0ef1cb33e4 SHA-1: 06d99c1c9d1ea807631fbcbf76ba88b7badd8076 SHA-256: 3b0583dabdd78218f8610253208731d9c28165b591581b5e993e9dad9fe410ee
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.com/pify?keyword=all+that+jazz+chicago+piano+sheet+music+pdf In PDF document text
    • http://files.tiptopindustries.com/uploads/1/3/0/9/130969689/kowubozazulepu.pdfIn PDF document text
    • http://files.eduexchange.org/uploads/1/3/2/7/132740564/putusaroraju.pdfIn PDF document text
    • http://files.aishathhuda.com/uploads/1/3/1/4/131454355/fde167c8f2b20d.pdfIn PDF document text
    • http://nanenitox.freemaninsure.com/uploads/1/3/0/7/130776449/2962541.pdfIn PDF document text
    • http://files.datamakers.com/uploads/1/3/0/9/130969231/sekuzun_debelel_tejiwege.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/1/0432/2630/0575/files/28457527495.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1423/4017/files/math_project_for_class_11_wbchse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6314/8706/files/84772771116.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pizegavegip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/apple_service_diagnostics_3s156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3603/0614/files/android_studio_video_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7744/3483/files/vonavaxaralazurapazubesas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5450/5882/files/5274615257.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1184/9890/files/4527364838.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/2317/2503/files/setozebi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0004/4454/files/lodovivapevutawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4225/8587/files/valutoj.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_off00004b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B79 5588 bytes
SHA-256: d7ff7a48044e3bb8b0ee9341c172fbc5d4c1bf4fc884dee20e703e6ce13396cf
font_01_sfnt_off00005e5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5E 9968 bytes
SHA-256: 83517317026b02a1878586ec9ff7582eb0d610e3467177f5102a32755b4009d2

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