Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfcb34e6dab64f53…

MALICIOUS

PDF

40.4 KB Created: 2020-10-30 17:15:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: c15e0b142c67e8a5f3b0e6c4204df61e SHA-1: d9b96e6445f1e45b071944f4c96233a29ebad35b SHA-256: cfcb34e6dab64f5380aa09eacc16febc7f6e70293094188304d99d617ce66801
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/123?keyword=equation+of+a+circle+worksheet+geometry In PDF document text
    • https://filafibiwi.weebly.com/uploads/1/3/4/3/134316544/aa05ad4e.pdfIn PDF document text
    • https://fobewesepujub.weebly.com/uploads/1/3/2/3/132303403/8390f08663.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f872f2f597f5.pdfIn PDF document text
    • https://wevuviwujito.weebly.com/uploads/1/3/1/6/131636984/893689.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f88b3ffcf06d.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/d18ffa92-20d5-406c-bf80-803cc0f8dea1/ark_small_dragons.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/60719067145.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/fesixipatazu.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/the_little_old_lady_who_broke_all_the_rules_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2480cd2a-70d4-4adc-a690-7525b6bad576/wevezumokagegofad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57c7ec2f-8c15-4936-8809-78c931691073/zajudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf6f8678-dfc3-42e4-adfa-e115dbb27c72/prada_plan_4.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/durable_power_of_attorney_sample.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_off00004fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FC8 5520 bytes
SHA-256: 00068840031442e063bb61650c00e766dd83a840e5f7d0048f3dc64c0761ca13
font_01_sfnt_off00006281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6281 10504 bytes
SHA-256: 7ff39ec2ef014fc6729906e80591227ac1943ff6f3be975e5cb5130abc9e15ba
font_02_sfnt_off00008684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8684 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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