Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a4a10816ccbd32b…

MALICIOUS

PDF

42.3 KB Created: 2020-11-06 19:14:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 1a0780345ac4cee5a6531ab4c6dd180c SHA-1: 74ef1d8d61c2fdfb1262c1c4593fce5661c7b161 SHA-256: 1a4a10816ccbd32b6daceb298a820486168586074004be5dddfc610ba9f05dc4
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake encrypted/secure-document view lure high SE_ENCRYPTED_DOC_LURE
    Document claims to be an encrypted or protected file that must be opened through a 'secure view' link, and the action link uses deceptive infrastructure. This is the secure-document credential-phishing carrier: the page imitates a secure-mail / document-cloud gate while the link leads to a harvesting site. action link to abused redirector.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?keyword=william+llewellyn+anabolics+11th+edition+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369487/normal_5f90e96508029.pdfIn PDF document text
    • https://fozokixudaxo.weebly.com/uploads/1/3/4/3/134355354/8788704.pdfIn PDF document text
    • https://xidalivukudupet.weebly.com/uploads/1/3/4/3/134319957/wonunufesujalik.pdfIn PDF document text
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/4513866.pdfIn PDF document text
    • https://rugaxiloved.weebly.com/uploads/1/3/4/3/134305568/60a8a5ee1dc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405642/normal_5f9c22b9d7b1e.pdfIn PDF document text
    • https://femevidawivuk.weebly.com/uploads/1/3/1/0/131071063/lajav_ramipomubevit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://givolajokofe.files.wordpress.com/2020/11/japatewajaliwififu.pdfIn PDF document text
    • https://juvibix.files.wordpress.com/2020/11/wazasusegupaxusijip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b789be25-cdf9-4986-ade5-56f05d066cfe/naruto_shippuden_225.pdfIn PDF document text
    • https://zepegegudo.files.wordpress.com/2020/11/cryptocurrency_for_dummies_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3761a2dc-588c-4e16-b9a0-4359eb954c92/jafegatedevez.pdfIn PDF document text
    • https://mutozofe.files.wordpress.com/2020/11/67728004733.pdfIn PDF document text
    • https://xupuzen.files.wordpress.com/2020/11/dijewajipamojafupojim.pdfIn PDF document text
    • https://fiwanawid.files.wordpress.com/2020/11/electronics_components_in_tamil.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_off00006415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6415 5696 bytes
SHA-256: 56266cb61d970eafbf806979b48b38b376f78c7d4c517ad5dca1635ab2aac173
font_01_sfnt_off00007774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7774 10756 bytes
SHA-256: 1610d6d565ea715cc7e7be1d977ef0d2e6d8dbb665b3bfa749c000095a3fb706

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