Malicious PDF — malware analysis report

Static analysis result for SHA-256 1de88b0cbd548311…

MALICIOUS

PDF

68.4 KB Created: 2020-12-17 21:24:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9b541c3786c6b34d574ce0f27516aec2 SHA-1: 246476a1e116ba182fa0cdad0a172f9a64fb5c9d SHA-256: 1de88b0cbd54831192ae6621978fc0893eeafe4a37af280f4e78f1b77dfee19a
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a link farm, directing users to a URL that appears to be a lure for downloading an APK game. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content.

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://traffnew.ru/123?utm_term=beyblade+metal+fusion+apk+game PDF link annotation
    • https://kibolimu.weebly.com/uploads/1/3/4/8/134872751/tusexura.pdfIn PDF document text
    • https://voteriboxovoviv.weebly.com/uploads/1/3/4/3/134352377/vebasawudolot.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://s3.amazonaws.com/bezegoluzose/lovemikafilisoximoj.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/4925967500.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/40409951976.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6e8e404a8c57c14871e0c/t/5fca28b1e4017829c173a4cf/1607084213695/kipowigivaxir.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/housing_allowance_forms_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/kopiboninijogalatatud.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/nijikalawudixuwuvutode.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd027f45ca4f790266f974/1606222463994/miller_and_levine_biology_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6606f9955c744b560c0eb/t/5fc7a303ad3e6411924ca3e0/1606918917479/29222828962.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54ad5cd1e280355f12c83/t/5fd145cf182c2b22a3692bac/1607550415473/battle_of_gods_movie_vs_anime.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0efc3b8467722f1d478d1/t/5fc2b46d2dd96f591847536d/1606595694171/nurokanaji.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_off0000bdf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDF9 5504 bytes
SHA-256: 15a40770f69c4356947bdb8cb7b14d40c5889f29ee2eba1ece52870e1184e5bc
font_01_sfnt_off0000d0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AB 11208 bytes
SHA-256: e28237b83564002320a3d1d7a2a865527905c3d874aac574cb257ea2e59c997c
font_02_sfnt_off0000f6e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E2 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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