Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb8b73ca6fed9295…

MALICIOUS

PDF

41.2 KB Created: 2020-10-08 10:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 8edd43c6e080eeca0b24bd659db7c450 SHA-1: 92631128a8995b0426b4e4632daae3ae72686a2e SHA-256: fb8b73ca6fed929550d630a4c454eb40abcfcba52c1d0acf5bf578de3ff54014
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=vertical+storage+shed+with+shelves In PDF document text
    • http://wetovorit.elliseffect.com/uploads/1/3/0/7/130775209/3069555.pdfIn PDF document text
    • http://xomenebo.pouredcandle.com/uploads/1/3/0/8/130814729/guramasekulew_jotelejafanip_jilesen.pdfIn PDF document text
    • http://gujesim.fiats.info/uploads/1/3/0/7/130738541/junoromu_jabexax.pdfIn PDF document text
    • http://files.permanentholiday.es/uploads/1/3/0/7/130775830/b04abe.pdfIn PDF document text
    • http://vapul.maritimeworldexpeditions.com/uploads/1/3/1/1/131164573/7a7784033a9.pdfIn PDF document text
    • https://site-1036962.mozfiles.com/files/1036962/1186164194.pdfIn PDF document text
    • https://site-1039207.mozfiles.com/files/1039207/40465936783.pdfIn PDF document text
    • https://site-1038548.mozfiles.com/files/1038548/82290883589.pdfIn PDF document text
    • https://site-1038981.mozfiles.com/files/1038981/57842831378.pdfIn PDF document text
    • https://site-1036879.mozfiles.com/files/1036879/buxese.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/1/0439/1796/7528/files/dabanizinug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0760/4896/files/the_church_is_mystery_word_search_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8835e63b-9672-4864-9f19-19bfa7fcc59d/dowotogekajibakajasufax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0bef230-d36d-4b7a-bc20-a5bfacaf85c4/63577035533.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_off00006326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6326 5320 bytes
SHA-256: d2f34dc7e6cda8f1b355d502a7a783f7e28207f37e3c24a43d69ad194e23d6b7
font_01_sfnt_off00007549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7549 10216 bytes
SHA-256: cfcf87611e8298beaeed9f2a5eed7522824e09a2768ef6b81be340772068cc1e