Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce95b516dded886a…

MALICIOUS

PDF

67.1 KB Created: 2020-12-02 17:33:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a1b1b31b7b56b97e39b7236156226873 SHA-1: 93d92ef2d035fd4b1986f080e59eee5aa206449e SHA-256: ce95b516dded886a941f2929e62fc802d5d640d011861b8082015df5cbdb50f6
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, flagged as a 'PDF_SEO_LINK_FARM', suggesting a malicious intent to redirect users to potentially harmful websites. The presence of the URL 'https://trafffi.ru/aws?utm_term=save+android+chrome+bookmarks' further supports this, as it is classified as unknown reputation. ClamAV also detected this file as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/aws?utm_term=save+android+chrome+bookmarks PDF link annotation
    • https://ragidogatekanex.weebly.com/uploads/1/3/4/3/134388076/vuveweviwim_moromekuborexid.pdfIn PDF document text
    • https://suwanozafedo.weebly.com/uploads/1/3/4/5/134587456/2676900.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc57497bd14ff0dd2bb5313/t/5fc655a6f8cdb769c6bb92c3/1606833574704/cupcake_art_ideas.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe08af3485235c868c5115/1606289589611/welavukezibewodi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0de27085bf90c0efce9ba/t/5fc157003c6ccf69f3900677/1606506241130/ckgs_indian_visa_fees.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/tofuwedimuvimitutujat.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/bancassurance_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/toram_online_best_leveling_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ea897fb-0d2b-4199-8a70-184bc2e8d281/xuwujuluvubemoxuretutip.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1772f116eb00e3c4ff943/t/5fc77afb4f9413233b230cc2/1606908667976/94434263747.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0b544c89e1c4b8fbd6471/t/5fc2ddd73c6ccf69f3bd8c96/1606606296761/backuptrans_license_keygen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71d452e4-5d21-471f-b303-7d2173992d7f/23524243924.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_off0000c988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC988 5516 bytes
SHA-256: 8cf4619438fb9020f2264027ef0d4ccde655b0ee3c4a0fe35b49e8638f2790d3
font_01_sfnt_off0000dc1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1E 10456 bytes
SHA-256: 7f1a0d50fbec156ecd366a915c1bb121e94b8e24481e024190df6dedd22568fe

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