Malicious PDF — malware analysis report

Static analysis result for SHA-256 650a17f749888eb8…

MALICIOUS

PDF

44.2 KB Created: 2020-10-15 19:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 720ebbf1e69752563acf650042ffc405 SHA-1: 991abd802ad92a4e538be3da48012b1fe6ef0e00 SHA-256: 650a17f749888eb8eff57807efd2f94d5b4964b6d8e758c051039dd3b2c844f5
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://gettraff.ru/123?keyword=meiosis+worksheet+high+school In PDF document text
    • https://welofubevi.weebly.com/uploads/1/3/1/8/131856084/6172502.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/5145362.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/majigukugevefob_bojaligodus_nutuw.pdfIn PDF document text
    • https://fulugive.weebly.com/uploads/1/3/0/8/130874350/9897828.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/fibawubaxavuvabu.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/foburadip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5f87a9ef0dad6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366376/normal_5f8741c434fa5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366965/normal_5f8732bace9f0.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/1/0488/0852/5989/files/xerusiwisidenixobetediri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4219/5624/files/freedom_high_school_marching_band_bethlehem_pa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3459/7784/files/xugar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8675/0916/files/dopuxadizalipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2014/3773/files/16628303226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9307/7405/files/kicker_outdoor_speakers_costco.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1453/5843/files/chicken_nuggets_calories_jack_in_the_box.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b59661b6-2a8f-4fc4-8b8b-c389be70f038/filukanar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2c3b994-1182-46f6-995c-062bcddfb46e/powasimanemokinijumivad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a93f06d-1d33-429f-8ae3-1fc234cc0b6a/33328441722.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88d104fd-be51-4cf6-8ae3-c276dfbc0e34/xadajo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e53a5499-6637-4569-accd-80277be5a5e4/dineroner.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_off00006f1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1D 5012 bytes
SHA-256: cdafc7d6f025b6e5fb5bb7c04259c43b8b1a2d7cceca657204f908a327cbc926
font_01_sfnt_off00008048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8048 10280 bytes
SHA-256: 3c6f98c6baaa246cee6e28005193045483ed9873a6f2c818acd7687ea220eed1

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