Malicious PDF — malware analysis report

Static analysis result for SHA-256 635f09075e73655b…

MALICIOUS

PDF

42.1 KB Created: 2020-11-08 13:52:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 346c70bf82f355a6c538b861d47aa404 SHA-1: a5ca7a729886ba320771ff1b8399838681ce9e81 SHA-256: 635f09075e73655bb8a065b74ce324b14690fb16b3c2f44887e2691d44466059
96 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://traffset.ru/aws?keyword=jcp+kiosk+work PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370062/normal_5f8a869b0cbc9.pdfIn PDF document text
    • https://mixorone.weebly.com/uploads/1/3/1/4/131438240/bofawuferexuku-tokaz-gikozi.pdfIn PDF document text
    • https://zonerizarom.weebly.com/uploads/1/3/4/3/134310007/wufunutetofujubisap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391636/normal_5f8f5acf5ac75.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/gebukil/73007168576.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/81526514400.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/hypodense_lesion_head_of_pancreas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15ec8421-13f4-47f5-ba04-e7b8b6882e91/tefidejebigemazuzif.pdfIn PDF document text
    • https://xuviwobetar.files.wordpress.com/2020/11/autodesk_revit_2017_student_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b191bec-df3d-415e-ba87-0cf33ac7e3d2/71577294658.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/teas_study_guide_2016.pdfIn PDF document text
    • https://pupigebogom.files.wordpress.com/2020/11/93754671377.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/91658455074.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/wetusiwoniwujutipab.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_off00006597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6597 4832 bytes
SHA-256: 004984d49ae0f8d066a9b8fccbecd89899c0d1ab5abae89c68ac579a75177e8b
font_01_sfnt_off0000762f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x762F 11228 bytes
SHA-256: 1848ad954065ed659e1e78e03e37bfbc9d937b0fbcf791288bcbab5ccb9c4ae9