Malicious PDF — malware analysis report

Static analysis result for SHA-256 7db1f024785cf0d6…

MALICIOUS

PDF

39.7 KB Created: 2020-04-12 10:40:13 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: 575e20123fa9448dcd43316690cb1a41 SHA-1: 5d91fbdef38be92d7e8079112ad9d25f7514eda2 SHA-256: 7db1f024785cf0d6b88b52175e2d78aeb93af38f97f7292dcd4246b5df88dc0d
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting an attempt to direct users to malicious websites. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 4

  • 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 http://devriesinsurance.org/uploads/1/3/1/0/131070605/131070605.html#glomerulonefritis+aguda+postestreptoc%C3%B3cica+slideshare PDF link annotation
    • http://chrisminamyer.com/uploads/1/3/0/8/130814921/7429671.pdfIn PDF document text
    • http://pocreate.com/uploads/1/3/1/3/131398244/xuwizu.pdfIn PDF document text
    • http://crokadile.com/uploads/1/3/1/1/131164104/jogaputufapeda_fogivuxuf.pdfIn PDF document text
    • http://transformativemeetings.com/uploads/1/3/0/7/130738739/1948399.pdfIn PDF document text
    • http://sarahjaynedesigns.com/uploads/1/3/0/2/130270917/9962193.pdfIn PDF document text
    • http://getawesomenow.com/uploads/1/3/1/3/131379256/2a9f5d7b154.pdfIn PDF document text
    • http://vegasvalleycpr.com/uploads/1/3/0/4/130435741/9345255.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E9 1700 bytes
SHA-256: e3a9e11047269c7cf4a6fbb51afef18afbda0372a11e4498b45861fc2d1374b4
font_01_sfnt_off00006e00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E00 9504 bytes
SHA-256: 98eafd89d5beee51b8f2f3a5fc14d32b2591696692149aa5fee18cc96c3a88c5

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