Malicious PDF — malware analysis report

Static analysis result for SHA-256 76e4701e72e06337…

MALICIOUS

PDF

41.2 KB Created: 2020-03-16 03:59:45 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 366826d3648976cfb5c863893685e037 SHA-1: ed7b2d44e349225592fe845f015dff01407cf9ee SHA-256: 76e4701e72e06337ca6f8908e37d8f12812ac5d73931a8eb0f8c0e098033640b
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified as a PDF link farm. The primary URL points to a page with 'website templates free vector', suggesting a lure. While no scripts were explicitly extracted, the heuristic 'ML_NYX_PDF_MALICIOUS' and the extensive link farm indicate a high likelihood of malicious intent, possibly to distribute further malware or engage in SEO spam. The document's structure and numerous links suggest it's part of a campaign to drive traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://host72.carmichaelnl.com/uploads/1/3/0/5/130588201/130588201.html#website+templates+free+vector
    • http://www.positivitymagic.com/uploads/1/3/0/6/130605324/dibepo.pdf
    • http://coalitionagainsthumantrafficking-northernaz.org/uploads/1/3/0/6/130620885/e2fdf93e282.pdf
    • http://insightbykiana.com/uploads/1/3/0/8/130813601/04625cd.pdf
    • http://charlesdickensjewelry.com/uploads/1/3/0/6/130621185/wozamazu.pdf
    • http://burracing.com/uploads/1/3/0/6/130621754/638b23fba.pdf
    • http://avidaustralianshepherds.com/uploads/1/3/0/7/130776254/2730379.pdf
    • http://redskinscheerleaderalumni.com/uploads/1/3/0/7/130775740/87f24.pdf
    • http://littlekungfupandasf.com/uploads/1/3/0/5/130550666/zajokukupux_tudigixufa_solexigazej_jemegutadebigop.pdf
    • http://mta-sts.cornerstonesaints.com/uploads/1/3/0/5/130590538/vakuxan.pdf
    • http://chefpetermilano.com/uploads/1/3/0/6/130620716/xilidaw.pdf
    • http://coloradocriminallawattorneys.com/uploads/1/3/0/5/130550781/9551754.pdf
    • http://morellicup.com/uploads/1/3/0/7/130776460/wurowukusa.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b32.bin
1f73208a2ce9fae6016e225ba545dba0cac4f72bbf02f0392c75540bdda0a2f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B32 7348 bytes

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