Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea3bfe1531345460…

MALICIOUS

PDF

41.9 KB Created: 2020-08-23 19:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4f7c726567bf48b2d01f83c9194e4ec5 SHA-1: 6b59ecbd2a71aebbc0e47a3d13f981c0349ee359 SHA-256: ea3bfe15313454603ecb9788945b1db20c82ae944b46fc5ef61250489310ce84
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.cc/pify?keyword=bhakti+gana+bhojpuri+dj+song In PDF document text
    • http://files.albertsenservices.com/uploads/1/3/1/0/131069789/bexewisenotepi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2040/3356/files/bobemu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7986/8324/files/voxulezoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2812/5595/files/2018-_19_calendar_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/84791268045.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9592/4637/files/docker_run_interactive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/duwaxufezemurogagur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/breast_cancer_awareness_questionnaire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9690/7678/files/67778144504.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6245/9544/files/nodit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5497/9477/files/digital_oscilloscope_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9770/1017/files/alice_merton_songs.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4348 5284 bytes
SHA-256: 970c45f1b7cb5703e8e0e0af993dd78517cee99a562673a32c58eeda363744af
font_01_sfnt_off0000551d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x551D 10132 bytes
SHA-256: cb6f34d102949e9819eeae7c7eecdc232efec25a2766f4cb24d2931e63162513
font_02_sfnt_off000077c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77C9 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
font_03_sfnt_off000085cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85CB 5720 bytes
SHA-256: 357c9868a8b7b1e65e1481c1aef3c8bc364c3bf7ebce6e3461081b0d968590be