Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f4fe4e4ea25b89…

MALICIOUS

PDF

58.6 KB Created: 2020-10-16 15:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0ab493df67a7041233100d154daba139 SHA-1: 6ad867870fd0525db4ae0e2eb8fa589ec5fbd3af SHA-256: c2f4fe4e4ea25b89deb523171ed11ccc4025d917dbb830f1d5e312bf7d2a5341
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.me/123?keyword=sri+lakshmi+narayana+hrudayam+stotram+telugu+pdf In PDF document text
    • https://wedebiki.weebly.com/uploads/1/3/0/9/130969436/bufakotik-wupeje-rexovifepelad.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/6752891a.pdfIn PDF document text
    • https://kagilovudugavap.weebly.com/uploads/1/3/1/1/131164538/kalavo.pdfIn PDF document text
    • https://suzokixuvajix.weebly.com/uploads/1/3/0/7/130776208/5b9cdcd9c38d221.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370087/normal_5f880c8f783cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f873b57e06e6.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/3167106f5.pdfIn PDF document text
    • https://tiwilofudux.weebly.com/uploads/1/3/1/6/131606348/1350966.pdfIn PDF document text
    • https://zidabowejixu.weebly.com/uploads/1/3/1/1/131163559/bemetoxa.pdfIn PDF document text
    • https://nanorobudilason.weebly.com/uploads/1/3/0/7/130775181/gotebabigete.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/ea1eadc07ab.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/1/0483/0137/5650/files/vepilusuvifoxupan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/6794/3328/files/app_drawer_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/69743207954.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9544/8988/files/lewis_dot_structures_practice_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3838/7607/files/konosuba_light_novel_volume_15.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9346/8331/files/ruladob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2931/8808/files/ninubamodirolovoxaveme.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_off0000a7fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7FD 5724 bytes
SHA-256: 516ca2331571f8ea213d1120155e24828c9c6f3c881e23037bd9dee0914c592a
font_01_sfnt_off0000bb4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB4D 9852 bytes
SHA-256: ebfec10893ccc54c64db9dbb2a18f3b36ef3d26d0637455cdfd5962851669167

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