Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aa665658ee2fd4b…

MALICIOUS

PDF

32.8 KB Created: 2020-06-05 07:28:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: bdcfce7225051383b992c7343a51a7da SHA-1: 3ddd940e8d31fee18796a825479f59d8fc37950a SHA-256: 4aa665658ee2fd4bd1e8716b8d11547245a228ea7fbdb2dcdb5d876a49f517d8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML_NYX_PDF_MALICIOUS heuristic also strongly indicates malicious intent. The embedded URLs suggest a link farm or redirection scheme designed to lead the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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 http://lifeinbetweenpodcast.com/uploads/1/3/0/8/130814984/130814984.html#statics+hibbeler+14th+edition+soluti PDF link annotation
    • http://mta-sts.ftsergioferreira.com/uploads/1/3/0/8/130813787/mujufa.pdfIn PDF document text
    • http://saskiarooijakkers.com/uploads/1/3/0/4/130475909/xivewidug-sifesasezinezuj.pdfIn PDF document text
    • http://namcodiversityexcellence.org/uploads/1/3/0/4/130476501/1094920.pdfIn PDF document text
    • http://catrustact.org/uploads/1/3/2/3/132302842/pezajufiju_mirugiwalapoxe_mesegij.pdfIn PDF document text
    • http://hairweaveswigssalelongisland.com/uploads/1/3/1/4/131407423/9280863.pdfIn PDF document text
    • http://folkthat.com/uploads/1/3/1/1/131163563/netalole.pdfIn PDF document text
    • http://mbagencies.eu/uploads/1/3/0/7/130739256/0630897.pdfIn PDF document text
    • http://cpcalendars.pamelaj.com/uploads/1/3/0/6/130639706/xuwulunudipu_pazituruwamen_vapivak.pdfIn PDF document text
    • http://tonibrenning.com/uploads/1/3/0/6/130620677/levisunefemexez_rafebasibigij_zuguwivogavom.pdfIn PDF document text
    • http://mail.ipc-test-site-4.com.au/uploads/1/3/0/6/130620990/nobejavojenon.pdfIn PDF document text
    • http://ismlondon.com/uploads/1/3/0/9/130969408/af97e189c858b.pdfIn PDF document text
    • http://lifeinbetweenpodcast.com/uploads/1/3/0/8/130814984/terms.htmlIn PDF document text
    • http://lifeinbetweenpodcast.com/uploads/1/3/0/8/130814984/dmca.htmlIn PDF document text
    • http://lifeinbetweenpodcast.com/uploads/1/3/0/8/130814984/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://liwesusefuku.files.wordpress.com/2020/06/13193207790.pdfIn PDF document text
    • https://sibosenageb322562333.files.wordpress.com/2020/06/majodulivagejakikafuji.pdfIn PDF document text
    • https://povepaju257855884.files.wordpress.com/2020/06/57201684223.pdfIn PDF document text
    • https://mozavun.files.wordpress.com/2020/06/90363045107.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A5A 8464 bytes
SHA-256: 8e826f00a3b31c2a1e0ebbd071201ee090fd8011d0aeb3e09644f113f8ea176b

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