Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f35f5883d52fee0…

MALICIOUS

PDF

45.1 KB Created: 2020-10-25 17:45:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: f82ebb79ba02a657d3e35279b8a2c7d5 SHA-1: 40b813efd9a4cedab8198cc1ffdaaa2181aa1acc SHA-256: 8f35f5883d52fee01f937d103109f9981bb761ce0a3bf87ea15be059580c1a6d
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.link/pify?keyword=eloquent+javascript+4th+edition+pdf In PDF document text
    • https://jabiratunibi.weebly.com/uploads/1/3/2/6/132683422/dozezobibemoj_winenutulejexur_loxukiziguvofa_vufoxokatuz.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/8683090.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372383/normal_5f93dd0a5f09d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379612/normal_5f8c47342aa6b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/68904751320.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/najivetelusezew.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/meningitis_pathophysiology.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/utility_in_economics.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/47917709895.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/juxaxapenavo.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/animorphs_all_books.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/buell_m2_parts_catalog.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/bsc_physical_science_with_chemistry_syllabus_du.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61e567de-1f7b-431d-9120-215f297642f4/48904597877.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3f4e068-7924-4b08-8f3f-d67acd59684d/14105813794.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aebd997b-b277-49ca-8456-365690c087a3/pokemon_crystal_rom_espaol_gba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83dfbf6f-8fe8-4611-bbb7-cec0a14792b6/dunuzelujutomuvine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef122e4e-696d-4345-9956-7431c8946b89/jewivis.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/6056474541.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/tepupisafikemodo.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/71299379105.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/griffith_theory_of_brittle_fracture.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_off00006ffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFB 5548 bytes
SHA-256: 2b53946793826b69aea0f824b99fc3e5ac0a4eed142ef1220b00e7e1f035e3e1
font_01_sfnt_off000082ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82EC 10676 bytes
SHA-256: 19260228e6a5cd7ffc59c8353d42d86f3c0b08e8505062d3acbf7a919e8fba35

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