Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce2693d25aacfcd2…

MALICIOUS

PDF

72.1 KB Created: 2021-01-02 23:53:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: edb255ca466c68bfd13660b97a18cabd SHA-1: e2a8464a8bb68cb5b09a7bb77d1c8f3641fb30df SHA-256: ce2693d25aacfcd227d52f5027e8c159dde4760cb9c28d54dbaa55062413ea67
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying a link farm. The primary URL points to a search query related to changing folder colors on a Macbook, suggesting a deceptive lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware via the linked resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://trafftec.ru/wb?keyword=change%20color%20of%20folders%20on%20macbook PDF link annotation
    • https://zapotaputilaka.weebly.com/uploads/1/3/2/6/132683001/linuzukirapev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381318/normal_5fcfb7e6553b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f87f2b5c45cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385230/normal_5fa0191cc51c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485153/normal_5fc3e4ecd2c7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458833/normal_5fe7f15fe84cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411252/normal_5fcf12a4c4594.pdfIn PDF document text
    • https://fejilezujew.weebly.com/uploads/1/3/4/3/134340931/dakenubugelosukefoki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371497/normal_5fd868e8f1dff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5f86fb04c9e4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445880/normal_5fa64ff1c1926.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/zetare/zurvita_compensation_plan_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/eternally_silenced_pinot_noir_tech_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/canadian_clinical_practice_guidelines_parenteral_nutrition.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_off0000db46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB46 5544 bytes
SHA-256: 9d65d40da1f64ad958ee911e74afd3ee3e862b119a9b26b3bdd296d11e4f5ae4
font_01_sfnt_off0000edee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEE 11004 bytes
SHA-256: a33257bb59ce36655c2c16851d3fe820a858384154980612fdc17707e7aabba4

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