Malicious PDF — malware analysis report

Static analysis result for SHA-256 d893c1c7c6a6648a…

MALICIOUS

PDF

36.9 KB Created: 2020-10-31 00:50:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: f3e74d8ff0269fed0494faf34b6b1844 SHA-1: 44a0bff79ce24c2ce54305b2509f7879b7a5e4ab SHA-256: d893c1c7c6a6648af6519c0d56387c5d68341506bdc2f1730f8a9e6114b14855
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.link/123?keyword=orange+county+nc+job+vacancies In PDF document text
    • https://nurirekesuvakip.weebly.com/uploads/1/3/4/4/134404885/jomunopajekobin.pdfIn PDF document text
    • https://nekizinatuzi.weebly.com/uploads/1/3/4/3/134325328/rubavitevuna_wuzove_jobamuwavajok_rikunigo.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005039.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005039.bin)
    • https://cdn.shopify.com/s/files/1/0481/8583/5677/files/52237830016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4029/0996/files/dejalugiliwimezopixi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4873/7194/files/aprendizagem_motora_de_discriminao_e_verbal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5666/7042/files/carbon_electrochemical_and_physicochemical_properties.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/political_parties_prospectus_crossword_puzzle_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d2066a4-0bb9-4925-a095-407adda613c6/7512094673.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/853ba587-63f3-4dbc-af9f-e3068d451d91/moxutunorabizililonun.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/chlamydia_trachomatis_adalah.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/022bfa3e-4718-4261-b6fe-d24d57ae4d63/75216454417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8168/7746/files/10402208049.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/2848/5548/files/pezidosun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66b3a969-e0e3-4b11-92b5-f1c5ab649d95/tigefi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0350/9399/files/94298506355.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/wobinobopixomeromagirisi.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_off00005039.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5039 5340 bytes
SHA-256: b7c6b301b83e656479526ea9f54566e75d8c36167d3dd7fde5aa0cbced0f3a12
font_01_sfnt_off00006283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6283 10860 bytes
SHA-256: abd12f7f8a2e8a219af4a424a6bd75a5ee00653a4f81db8425648d33f5fa2423