Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9fe6f3d0b7c820f…

MALICIOUS

PDF

39.3 KB Created: 2020-10-30 06:12:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 51659dc1c7ea28bfab1724925e9b5f1d SHA-1: 9ce1096d4c4a51fbee62491d09a86dd190fa32b4 SHA-256: a9fe6f3d0b7c820f3f9d81882c8853fbb3f04104b60eee8bd8c0f04d00a256f4
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=head+soccer+games+online In PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/5649215.pdfIn PDF document text
    • https://vozexipazaxa.weebly.com/uploads/1/3/4/4/134444785/5079907.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377704/normal_5f9a5dc4488d3.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/kadupe_ripovu_jozovagazemewe.pdfIn PDF document text
    • https://dokodajibebabek.weebly.com/uploads/1/3/2/3/132302773/rogami.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371014/normal_5f906dcb6d9f0.pdfIn PDF document text
    • https://lajojixuvoporor.weebly.com/uploads/1/3/0/7/130738555/negila.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/1/0431/9418/7933/files/whatsapp_apk_download_versi_baru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2308/8290/files/55750641572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea08fe4f-0155-478a-8bf2-ef2700eb4b12/nurarihyon_no_mago_manga.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/gofabizokugufasemalemor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1916/9702/files/finusiratagekexelo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/6102/4185/files/53378729291.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_off00005e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E26 5220 bytes
SHA-256: f3b21a37d18d76c11bb923fa7516e67a6b479085f695d3de7f60a22c026b58e9
font_01_sfnt_off00006fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC7 9560 bytes
SHA-256: d2f91e4bc755e35d07b7479994ca9912f04d8745dd9888ef693664f1ab3a94c4