Malicious PDF — malware analysis report

Static analysis result for SHA-256 49d909851591271e…

MALICIOUS

PDF

79.8 KB Created: 2020-11-12 22:56:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 0a1939ee7806c79f3119f77034feac52 SHA-1: 57df809667e56b379a897cbbf60c429ac131617d SHA-256: 49d909851591271edce5cf613650bd946a7aad41d34ea917d2dc75e236aae338
264 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • ClamAV: Pdf.Malware.Agent-9992188-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Malware.Agent-9992188-0
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/fizasolunajik.pdf.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafficel.ru/123?utm_term=seatgeek+vs+stubhub+vs+vivid PDF link annotation
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/fizasolunajik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391024/normal_5f9a0062f144e.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/60c88c.pdfIn PDF document text
    • https://zunovuxosuseso.weebly.com/uploads/1/3/4/4/134497136/fedelodupofurokib.pdfIn PDF document text
    • https://mivijupa.weebly.com/uploads/1/3/4/5/134578330/9707583.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458635/normal_5fa8b7cd2ec85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379359/normal_5f9761ccebba9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417145/normal_5fa43b9aed0fa.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/wedidik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371800/normal_5f8951cd273e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_5f87577341d6b.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/wajibile/wewite.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/59132775198.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/nikkormat_ft2_review.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/african_shower_curtains_for_bathroom.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_off0000fce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE0 5328 bytes
SHA-256: 84fbdf0ac2ce2bd203bcef41c6ec146371490faa93fb5ad2ef0fe6927f810ee3
font_01_sfnt_off00010f03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F03 10356 bytes
SHA-256: 67f61e051cb9d452898d8aaeea8f150936c4c5e459c1c80823f6043409bca7bb