Malicious PDF — malware analysis report

Static analysis result for SHA-256 97736404c448ab96…

MALICIOUS

PDF

49.2 KB Created: 2020-08-21 09:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5c22eab799e517737b21355ea46536d3 SHA-1: 29fffdb2950c333b9031569b4d8632c316ebfeee SHA-256: 97736404c448ab96f529d390d2c01b47c3e9c99967cc1eac3649d99dbd7242d8
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.com/pify?keyword=invalid+email+address+format+cognito In PDF document text
    • http://minivofar.pinestschool.com/uploads/1/3/1/4/131453177/b2be989c.pdfIn PDF document text
    • http://files.bahrainaviators.com/uploads/1/3/2/6/132695915/dolatizom.pdfIn PDF document text
    • http://files.kstaterodeoclub.com/uploads/1/3/1/4/131453588/nuvowifevaz.pdfIn PDF document text
    • http://jurexasu.itsharryclarke.com/uploads/1/3/2/3/132303382/xuwifuxarowij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6484/2647/files/xojopigopofikene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5516/9186/files/83974171589.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5652/9562/files/92718642901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/69939775099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2351/6323/files/89794520946.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0436/1895/files/vevatexatuwaguliros.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4351/8629/files/fukubilotikijisuvosubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6135/4389/files/workforce_planning_hyperion_admin_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/isuzu_npr_labor_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/xiwopovakirexuronuja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8210/5511/files/93445283511.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_off00007e2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E2E 5340 bytes
SHA-256: ea4481552069127616ad4c9bf664d72cb69bbaff3743dc09628e5cbc5ffb59ae
font_01_sfnt_off0000903c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x903C 12368 bytes
SHA-256: 3f9af7d69e758f48e98caf8773b799b0d3e171181569de7ce581aa4b61afe262

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