Malicious PDF — malware analysis report

Static analysis result for SHA-256 44fb7b42d357d4da…

MALICIOUS

PDF

65.4 KB Created: 2020-11-04 05:05:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 259972e3e8365d3da6d39c893f6cceba SHA-1: 9d20d164debc060ca896e145c9f8802c4864daf3 SHA-256: 44fb7b42d357d4dae7f03d44d46411e307d6df94f9ba062f83198c9240c99fc8
132 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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://ggtraff.ru/123?keyword=irony+in+the+crucible+worksheet In PDF document text
    • https://tenikekiso.weebly.com/uploads/1/3/0/7/130775729/genarosabu.pdfIn PDF document text
    • https://lepitosamodovax.weebly.com/uploads/1/3/4/3/134335454/eb7b1c.pdfIn PDF document text
    • https://ninuwekij.weebly.com/uploads/1/3/4/6/134625354/lefopokubasute_xavuf_diwibisu_fowatip.pdfIn PDF document text
    • https://tufelovewojamex.weebly.com/uploads/1/3/4/3/134331554/3a707.pdfIn PDF document text
    • https://zoxaminajoge.weebly.com/uploads/1/3/1/6/131637873/9544597.pdfIn PDF document text
    • https://tetobalowuw.weebly.com/uploads/1/3/4/5/134523757/wiwonolulosuko.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/farezelof/9904122463.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b38b847-c7e4-4beb-a7a9-a4058950294f/51768158240.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/glade_sense_and_spray_refills_savers.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/50016847480.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef1c6465-a9d8-4716-bb8d-6a7d3529c584/the_filmmakers_handbook_epub.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/favojutis.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8697 12276 bytes
SHA-256: dec9d8d37c1a260972d96a60809c23cc112010d2e553f1be35de186eac1a9aa8
font_01_sfnt_off0000adca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADCA 5012 bytes
SHA-256: 096c771b7df83a5835c9b34056a7c907a4462301b62b215d4c8486804bc0eb1d
font_02_sfnt_off0000beec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEEC 10556 bytes
SHA-256: ecccf1a4f306041f25241052d6c13f44b18815bb58f51f4117219e7f193a1e9a
font_03_sfnt_off0000e33d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33D 16060 bytes
SHA-256: 1018660efa6a1a00280f0dbd6ee9814149b2344b9acf14d98de2cb76d1e712aa