Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9ecc182d5e296d0…

MALICIOUS

PDF

43.2 KB Created: 2020-10-28 15:13:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: f9d47d4cc36adf10bb60b3656eaf1e7b SHA-1: 8c5233b46833de6f33cfd20e7825cf82b5174b1d SHA-256: d9ecc182d5e296d0b4d02f527bb08fb74b24e3178687a2818323e1f1683aa574
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://cctraff.ru/aws?keyword=9+pointed+star+angles In PDF document text
    • https://konanofekevofi.weebly.com/uploads/1/3/4/3/134367310/wepidupev.pdfIn PDF document text
    • https://vilujelirajoki.weebly.com/uploads/1/3/4/3/134378771/gikuforudotoga.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006570.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006570.bin)
    • https://s3.amazonaws.com/zifozujiwi/xazores.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac69b48b-9eef-41be-b061-a32e4f5308ed/piveteravezebofaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8405d716-a14d-4916-babf-cf0ce6ec5974/runescape_deployable_herb_burner.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/surah_yasin_rumi_dan_jawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8427/6415/files/jopenabetuxorofivuvawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3903/8359/files/lotagedujudurasawa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37cdb657-ecfb-450c-aee6-9ab5fc14130b/nutokonitikadonig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3055e0bc-da1c-4b10-a258-f3d761c0f347/61177516674.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/mental_health_assessment_form.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/vetusoburujujipojefarolen.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/a_b_z_dna.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/99350051575.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/kerilosilosowobud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1b02523-36ec-49d3-90c1-00c097c888c4/fesofoxosipoluvifejav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6074/7161/files/3038731923.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9953/2701/files/to_be_continued_filter_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6094/3769/files/zovegisopila.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 extracted file (font_00_sfnt_off00006570.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6570 5188 bytes
SHA-256: 62d21700cc9d679712fa5937252b9cd24f73920f0f7aa3320fe115dfa8e584f3
font_01_sfnt_off0000771e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x771E 12100 bytes
SHA-256: edf3c0db49b0bc5e0a2be531fdea775b25d2047931bb6ee5db61ed4e2c11ca98