Malicious PDF — malware analysis report

Static analysis result for SHA-256 01d684289ef041b9…

MALICIOUS

PDF

42.7 KB Created: 2020-11-05 21:12:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: e64dbcb26ebb460b3e1d9795fb9a5513 SHA-1: ad4967f51ae6e6674b05438ca97247ca2666198a SHA-256: 01d684289ef041b98670bf15ff7cbb8e1b0c52190c5c7b2432833ed0d8729155
144 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.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/aws?keyword=texas+rental+eviction+notice+forms PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380522/normal_5f97d9d687ab4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390660/normal_5f8fc8387bbf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367304/normal_5f8b5749ba718.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369933/normal_5f8c7851eba08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365542/normal_5f90148b6e485.pdfIn PDF document text
    • https://nikuwexipamojag.weebly.com/uploads/1/3/0/8/130813731/b1f54e62a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371010/normal_5f9783158a7ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f98a58db0a3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367297/normal_5f9214bf70fe5.pdfIn PDF document text
    • https://juzapojoxop.weebly.com/uploads/1/3/4/3/134370352/xozonojovij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382003/normal_5f91765e25034.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393028/normal_5f9041a1629ad.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
    • https://uploads.strikinglycdn.com/files/9223bf21-d456-403f-8657-7d48af4d3f06/rojodomatuxewixo.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/interview_questions_on_python_for_freshers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1cc965f-e15a-4ecd-b4f9-c61ad86dde27/thomas_risky_rails_bridge_drop_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/56945783103.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C8D 4892 bytes
SHA-256: 55f49cc94787d3e2788eac2d455b73386943aa6683762bcf7fdc5fc3b5d16bb1
font_01_sfnt_off00006d15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D15 10132 bytes
SHA-256: 87e2f39001bbfaf04c26dc4af1ba15e0ba2e84a39c677c707d6f89b763890a4f
font_02_sfnt_off00008f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F92 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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